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Wigley, Mark. „How do the Swiss produce their New National Map Series?“ Abstracts of the ICA 1 (15.07.2019): 1. http://dx.doi.org/10.5194/ica-abs-1-402-2019.
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<p><strong>Abstract.</strong> Switzerland, not unlike Japan, has a difficult and challenging topography to map.</p><p>The Swiss have been officially mapping their country now for nearly 175 years, which started when the “Bureau topographique fédéral” first published the initial set of official National maps in 1845. The various Swiss National Map series have been revised a number of times throughout its history and the latest revision and update was carried out in 2014 when the Federal Office of Topography swisstopo, published the first four sheets in the new generation of maps at 1:25’000.</p><p>Swisstopo have, with their new revised map series not only reviewed, challenged and changed their map production procedures but completely redesigned them.</p><p>The new production procedures for the national map series 1:10’000, 1:25’000, 1:50’000 and 1:100’000 are now all based on the 1:10’000 Topographic Landscape Model (TLM) where GIS methodology and software have replaced the old cartographic software.</p><p>Each of these four scales brings its own unique series of challenges such as generalisation, map design and labelling, and each goes through the same three main production procedures: automatic generalisation, cartographic improvement and manual cartographic finishing.</p><p>The automatic model and cartographic generalisation are performed by a large series of procedures, taking the base TLM data and preparing it for the required scale.</p><p>The cartographic improvement involves running preconfigured, so-called “Carto Processes” which perform cartographic improvements such as improving the road endings, creating annotations and various masks, rotating symbols and suppressing certain feature details.</p><p>The manual cartographic finishing (not required for the fully automatic 1:10’000 national map) is carried out by a highly skilled cartographic workforce, which take over where the automatic procedures fail to produce the required cartographic finish which the local market still demands from its National Mapping Agency.</p>
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Tagne, H., A. Le Bris, D. Monkam und C. Mallet. „CLASSIFICATION OF TIME SERIES OF SENTINEL-2 IMAGES FOR LARGE SCALE MAPPING IN CAMEROON“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B3-2020 (21.08.2020): 633–40. http://dx.doi.org/10.5194/isprs-archives-xliii-b3-2020-633-2020.
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Abstract. Sentinel-2 satellites provide dense image time series exhibiting high spectral, spatial and temporal resolution. These images are in particular of utter interest to map Land-Cover (LC) at large scale. LC maps can now be computed on a yearly basis at the scale of a country with efficient supervised classifiers, assuming suitable training data are available. However, the efficient exploitation of large amount of Sentinel-2 imagery still remain challenging on unexplored areas where state-of-the-art classifiers are prone to fail. This paper focuses on Land-Cover mapping over Cameroon for the purpose of updating the national topographic geodatabase. The ι2 framework is adopted and tested for the specificity of the country. Here, experiments focus on generic classes (five) which enables providing robust focusing masks for higher resolution classifications. Two strategies are compared: (i) a LC map is calculated out of a year long time series and (ii) monthly LC maps are generated and merged into a single yearly map. Satisfactory accuracy scores are obtained, allowing to provide a first step towards finer-grained map retrieval.
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Volkova, E. A. „(A review) Vegetation and biotopes of the National Park “Narochansky” with the Map of terrestrial vegetation (S. 1 : 60 000) and the Map of biotopes (S. 1 : 60 000)“. Geobotanical mapping, Nr. 2019 (2019): 68–72. http://dx.doi.org/10.31111/geobotmap/2019.68.
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A monograph “Vegetation and biotopes of the “Narochansky” National Park was published in Minsk, Belarus in 2017, edited by A. V. Pugachevsky (Grummo et al., 2017). It includes the Map of terrestrial vegetation (S. 1 : 60 000) and the Map of biotopes (S. 1 : 60 000). Some small-scale maps such as the Map of changes in forest cover of the “Narochansky” National Park for the period 1985–2016, the Map of forest loss in the “Narochansky” National Park for the period 1985–2016 and a series of inventory and analytical maps on the basin of the Naroch Lake are given. This monograph can be considered as a small regional Atlas with detailed explanatory texts to the maps. It presents the experience on vegetation mapping accumulated in the Laboratory of Geobotany and Vegetation mapping of the Institute of Experimental Botany of the National Academy of Sciences of Belarus. Despite some critical comments, mainly concerning the biotope map, this publication of Belarusian geobotanists deserves an approval. They received the full answers to the questions posed: “What do we protect?” and “What is a current state of the vegetation of the National Park and the main trends of its dynamics? Cartographic design is made at a high level; the maps have both scientific and practical importance in the planning of environmental and economic activities.
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Bazzi, Hassan, Nicolas Baghdadi, Mohammad El Hajj, Mehrez Zribi, Dinh Ho Tong Minh, Emile Ndikumana, Dominique Courault und Hatem Belhouchette. „Mapping Paddy Rice Using Sentinel-1 SAR Time Series in Camargue, France“. Remote Sensing 11, Nr. 7 (11.04.2019): 887. http://dx.doi.org/10.3390/rs11070887.
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This study proposes an effective method to map rice crops using the Sentinel-1 SAR (Synthetic Aperture Radar) time series over the Camargue region, Southern France. First, the temporal behavior of the SAR backscattering coefficient over 832 plots containing different crop types was analyzed. Through this analysis, the rice cultivation was identified using metrics derived from the Gaussian profile of the VV/VH time series (3 metrics), the variance of the VV/VH time series (one metric), and the slope of the linear regression of the VH time series (one metric). Using the derived metrics, rice plots were mapped through two different approaches: decision tree and Random Forest (RF). To validate the accuracy of each approach, the classified rice map was compared to the available national data. Similar high overall accuracy was obtained using both approaches. The overall accuracy obtained using a simple decision tree reached 96.3%, whereas an overall accuracy of 96.6% was obtained using the RF classifier. The approach, therefore, provides a simple yet precise and powerful tool to map paddy rice areas.
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Yang, Mei, Jianjun Liu, Yuanjie Zhang und Xuemei Li. „DESIGN AND CONSTRUCTION OF MASSIVE DIGITAL ORTHOPHOTO MAP DATABASE IN CHINA“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (13.06.2016): 103–6. http://dx.doi.org/10.5194/isprsarchives-xli-b4-103-2016.
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Digital orthophoto maps have great advantages of high precision, plentiful information, fine intuition and visualization and convenient acquisition, as one of the most important part of national spatial data infrastructure (NSDI), and a type of required data resources in geo-spatial industry.Within last few years, large volume of high-resolution remotely sensed images have become available, obtained by various remotely sensed platforms. The acquired remotely sensed images continuously increasing by exponential order have brought a series of problems about storage, management, distribution and applications of massive image data. The objectives of the following research is to investigate how to design and construct national digital orthophoto map database which is mainly constituted by domestic remotely sensed images. In this paper, according to technical characteristics of national fundamental geo-information image database, we analyzed and then put forward the demands and functions of multi-source and massive database of digital orthophoto maps, and constructed an example of DOM database primarily on the basis of domestic remoted images such as ZY-3 and TH-1.
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Yang, Mei, Jianjun Liu, Yuanjie Zhang und Xuemei Li. „DESIGN AND CONSTRUCTION OF MASSIVE DIGITAL ORTHOPHOTO MAP DATABASE IN CHINA“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (13.06.2016): 103–6. http://dx.doi.org/10.5194/isprs-archives-xli-b4-103-2016.
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Digital orthophoto maps have great advantages of high precision, plentiful information, fine intuition and visualization and convenient acquisition, as one of the most important part of national spatial data infrastructure (NSDI), and a type of required data resources in geo-spatial industry.Within last few years, large volume of high-resolution remotely sensed images have become available, obtained by various remotely sensed platforms. The acquired remotely sensed images continuously increasing by exponential order have brought a series of problems about storage, management, distribution and applications of massive image data. The objectives of the following research is to investigate how to design and construct national digital orthophoto map database which is mainly constituted by domestic remotely sensed images. In this paper, according to technical characteristics of national fundamental geo-information image database, we analyzed and then put forward the demands and functions of multi-source and massive database of digital orthophoto maps, and constructed an example of DOM database primarily on the basis of domestic remoted images such as ZY-3 and TH-1.
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Fairbairn, D. „The Role of Education in the International Map Year 2015/16“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-6 (23.04.2014): 19–23. http://dx.doi.org/10.5194/isprsarchives-xl-6-19-2014.
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This paper considers the nature of the ICA-organised International Map Year (IMY), an initiative supported through United Nations structures, including the United Nations initiative on Global Geographic Information Management (UN-GGIM). Preparatory work for this project has been undertaken by a Working Group of the International Cartographic Association, and details are presented of the way in which IMY will be organised and promoted. Particular activities mentioned in depth include "national map days", children’s activities, and a new book. The educational aspects of IMY are addressed, and the roles of the events and resources Are considered. It is concluded that IMY gives a significant opportunity to the world-wide cartographic community to promote its discipline through the medium of a series of activities which can be co-ordinated by ICA, but delivered at a national level.
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Shew, Aaron M., und Aniruddha Ghosh. „Identifying Dry-Season Rice-Planting Patterns in Bangladesh Using the Landsat Archive“. Remote Sensing 11, Nr. 10 (24.05.2019): 1235. http://dx.doi.org/10.3390/rs11101235.
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In many countries, in situ agricultural data is not available and cost-prohibitive to obtain. While remote sensing provides a unique opportunity to map agricultural areas and management characteristics, major efforts are needed to expand our understanding of cropping patterns and the potential for remotely monitoring crop production because this could support predictions of food shortages and improve resource allocation. In this study, we demonstrate a new method to map paddy rice using Google Earth Engine (GEE) and the Landsat archive in Bangladesh during the dry (boro) season. Using GEE and Landsat, dry-season rice areas were mapped at 30 m resolution for approximately 90,000 km2 annually between 2014 and 2018. The method first reconstructs spectral vegetation indices (VIs) for individual pixels using a harmonic time series (HTS) model to minimize the effect of any sensor inconsistencies and atmospheric noise, and then combines the time series indices with a rule-based algorithm to identify characteristics of rice phenology to classify rice pixels. To our knowledge, this is the first time an annual pixel-based time series model has been applied to Landsat at the national level in a multiyear analysis of rice. Findings suggest that the harmonic-time-series-based vegetation indices (HTS-VIs) model has the potential to map rice production across fragmented landscapes and heterogeneous production practices with comparable results to other estimates, but without local management or in situ information as inputs. The HTS-VIs model identified 4.285, 4.425, 4.645, 4.117, and 4.407 million rice-producing hectares for 2014, 2015, 2016, 2017, and 2018, respectively, which correlates well with national and district estimates from official sources at an average R-squared of 0.8. Moreover, accuracy assessment with independent validation locations resulted in an overall accuracy of 91% and a kappa coefficient of 0.83 for the boro/non-boro stable rice map from 2014 to 2018. We conclude with a discussion of potential improvements and future research pathways for this approach to spatiotemporal mapping of rice in heterogeneous landscapes.
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Gough, Ian, und Theo Thomas. „Why Do Levels of Human Welfare Vary among Nations?“ International Journal of Health Services 24, Nr. 4 (Oktober 1994): 715–48. http://dx.doi.org/10.2190/kham-m986-w67t-56b7.
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This article investigates what factors explain the wide differences in human welfare among nations. Applying the theory of human need developed by Doyal and Gough, the authors construct a series of indicators of need satisfaction and use these to map contemporary national levels of welfare. They criticize past cross-national studies of welfare outcomes for using a single index of welfare, usually the Physical Quality of Life Index. A comprehensive model of national differences in need satisfaction is then developed. Seven theories are deployed and are tested against the evidence using path analysis, which permits different causal patterns to be simultaneously considered. The authors conclude that per capita incomes are only one of several factors explaining cross-national variations in need satisfaction: the degree of economic and political independence, the extent of democracy and human rights, the capacity and dispositions of the state, and relative gender equality all positively and independently affect a nation's level of welfare. Economic development alone cannot guarantee social development.
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Hubert-Moy, Laurence, Jeanne Thibault, Elodie Fabre, Clémence Rozo, Damien Arvor, Thomas Corpetti und Sébastien Rapinel. „Mapping Grassland Frequency Using Decadal MODIS 250 m Time-Series: Towards a National Inventory of Semi-Natural Grasslands“. Remote Sensing 11, Nr. 24 (17.12.2019): 3041. http://dx.doi.org/10.3390/rs11243041.
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Semi-natural grasslands are perennial ecosystems and an important part of agricultural landscapes that are threatened by urbanization and agricultural intensification. However, implementing national grassland conservation policies remains challenging because their inventory, based on short-term observation, rarely discriminate semi-natural permanent from temporary grasslands. This study aims to map grassland frequency at a national scale over a long period using Moderate Resolution Imaging Spectroradiometer (MODIS) 250 m satellite time-series. A three-step method was applied to the entire area of metropolitan France (543,940 km²). First, land-use and land-cover maps—including grasslands—were produced for each year from 2006–2017 using the random forest classification of MOD13Q1 and MYD13Q1 products, which were calibrated and validated using field observations. Second, grassland frequency from 2006–2017 was calculated by combining the 12 annual maps. Third, sub-pixel analysis was performed using a reference layer with 20 m spatial resolution to quantify percentages of land-use and land-cover classes within MODIS pixels classified as grassland. Results indicate that grasslands were accurately modeled from 2006–2017 (F1-score 0.89–0.93). Nonetheless, modeling accuracy varied among biogeographical regions, with F1-score values that were very high for Continental (0.94 ± 0.01) and Atlantic (0.90 ± 0.02) regions, high for Alpine regions (0.86 ± 0.04) but moderate for Mediterranean regions (0.62 ± 0.10). The grassland frequency map for 2006–2017 at 250 m spatial resolution provides an unprecedented view of stable grassland patterns in agricultural areas compared to existing national and European GIS layers. Sub-pixel analysis showed that areas modeled as grasslands corresponded to grassland-dominant areas (60%–94%). This unique long-term and national monitoring of grasslands generates new opportunities for semi-natural grassland inventorying and agro-ecological management.
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Xue, Yongbiao, Yiming Bao, Zhang Zhang, Wenming Zhao, Jingfa Xiao, Shunmin He, Guoqing Zhang et al. „Database Resources of the National Genomics Data Center, China National Center for Bioinformation in 2021“. Nucleic Acids Research 49, Nr. D1 (11.11.2020): D18—D28. http://dx.doi.org/10.1093/nar/gkaa1022.
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Abstract The National Genomics Data Center (NGDC), part of the China National Center for Bioinformation (CNCB), provides a suite of database resources to support worldwide research activities in both academia and industry. With the explosive growth of multi-omics data, CNCB-NGDC is continually expanding, updating and enriching its core database resources through big data deposition, integration and translation. In the past year, considerable efforts have been devoted to 2019nCoVR, a newly established resource providing a global landscape of SARS-CoV-2 genomic sequences, variants, and haplotypes, as well as Aging Atlas, BrainBase, GTDB (Glycosyltransferases Database), LncExpDB, and TransCirc (Translation potential for circular RNAs). Meanwhile, a series of resources have been updated and improved, including BioProject, BioSample, GWH (Genome Warehouse), GVM (Genome Variation Map), GEN (Gene Expression Nebulas) as well as several biodiversity and plant resources. Particularly, BIG Search, a scalable, one-stop, cross-database search engine, has been significantly updated by providing easy access to a large number of internal and external biological resources from CNCB-NGDC, our partners, EBI and NCBI. All of these resources along with their services are publicly accessible at https://bigd.big.ac.cn.
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Luna, Juan Pablo, und Hillel David Soifer. „Capturing Sub-National Variation in State Capacity: A Survey-Based Approach“. American Behavioral Scientist 61, Nr. 8 (Juli 2017): 887–907. http://dx.doi.org/10.1177/0002764217720964.
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Though there are many existing measures of state capacity, few capture its sub-national territorial variation in a reliable and valid way. This article proposes a novel, survey-based, measurement strategy for state capacity that is tailored to address this limitation of existing measures, and apply it to contemporary Latin America. We describe cross-national variation in state capacity based on data produced by our measure, engage in a series of validation exercises to show that it taps this concept rather than related elements of the political context, and map variation in sub-national stateness in Latin America. The article closes with an agenda for future research applying our measurement strategy to assess sub-national variation in stateness, in Latin America and beyond.
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Oksanen, Juha, Pyry Kettunen und Christian Koski. „Plain cartography – web maps for visually impaired and elderly people“. Abstracts of the ICA 1 (15.07.2019): 1–2. http://dx.doi.org/10.5194/ica-abs-1-281-2019.
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<p><strong>Abstract.</strong> Governmental services are being digitalized rapidly, and many European countries are currently implementing their eGovernance strategies. Although digitalization in general lowers the barriers between governance and citizens, there is also a significant risk that where a section of citizens is concerned, the barriers actually get higher. eGovernment services rely mostly on visual user interfaces, but globally approximately 1.3 billion people have some form of visual impairment. Furthermore, societies around the world will face the challenge of demographic transition, where most people are expected to live longer than 60 years and by 2080 almost 30% of the EU-28 population may be over the age of 65.</p><p>In our study, we propose a complementary approach to the Web Content Accessibility Guidelines 2.0 for accessible spatial communication, where the content of web maps is optimized for people with abnormal eyesight and possibly degraded cognition. By defining plain cartography, we set the design principles for simplified digital maps (Figure 1) by taking how maps are seen into account and how they are understood by these special groups.</p><p>We demonstrate the implementation of design principles in the Plain Map series produced by the National Land Survey of Finland and summarize the results of a usability test. Based on these results, the need of plain cartography for the visually impaired is high. In general, the feedback of the Plain Map series was very positive, and maps designed with increased clarity and high-contrast colors were seen much better than regular background maps. The implementation of the presented principles for generating plain map series is a small effort for National Mapping Authorities (NMAs), but it has an enormous impact through the improved accessibility of background maps in eGovernment services.</p>
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Chen, J., D. Wang, R. L. Zhao, H. Zhang, A. Liao und J. Jiu. „Fast Updating National Geo-Spatial Databases with High Resolution Imagery: China's Methodology and Experience“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-4 (23.04.2014): 41–50. http://dx.doi.org/10.5194/isprsarchives-xl-4-41-2014.
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Geospatial databases are irreplaceable national treasure of immense importance. Their up-to-dateness referring to its consistency with respect to the real world plays a critical role in its value and applications. The continuous updating of map databases at 1:50,000 scales is a massive and difficult task for larger countries of the size of more than several million's kilometer squares. This paper presents the research and technological development to support the national map updating at 1:50,000 scales in China, including the development of updating models and methods, production tools and systems for large-scale and rapid updating, as well as the design and implementation of the continuous updating workflow. <br><br> The use of many data sources and the integration of these data to form a high accuracy, quality checked product were required. It had in turn required up to date techniques of image matching, semantic integration, generalization, data base management and conflict resolution. Design and develop specific software tools and packages to support the large-scale updating production with high resolution imagery and large-scale data generalization, such as map generalization, GIS-supported change interpretation from imagery, DEM interpolation, image matching-based orthophoto generation, data control at different levels. <br><br> A national 1:50,000 databases updating strategy and its production workflow were designed, including a full coverage updating pattern characterized by all element topographic data modeling, change detection in all related areas, and whole process data quality controlling, a series of technical production specifications, and a network of updating production units in different geographic places in the country.
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Nishina, Kazuya, Akihiko Ito, Naota Hanasaki und Seiji Hayashi. „Reconstruction of spatially detailed global map of NH<sub>4</sub><sup>+</sup> and NO<sub>3</sub><sup>−</sup> application in synthetic nitrogen fertilizer“. Earth System Science Data 9, Nr. 1 (20.02.2017): 149–62. http://dx.doi.org/10.5194/essd-9-149-2017.
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Abstract. Currently, available historical global N fertilizer map as an input data to global biogeochemical model is still limited and existing maps were not considered NH4+ and NO3− in the fertilizer application rates. This paper provides a method for constructing a new historical global nitrogen fertilizer application map (0.5° × 0.5° resolution) for the period 1961–2010 based on country-specific information from Food and Agriculture Organization statistics (FAOSTAT) and various global datasets. This new map incorporates the fraction of NH4+ (and NO3−) in N fertilizer inputs by utilizing fertilizer species information in FAOSTAT, in which species can be categorized as NH4+- and/or NO3−-forming N fertilizers. During data processing, we applied a statistical data imputation method for the missing data (19 % of national N fertilizer consumption) in FAOSTAT. The multiple imputation method enabled us to fill gaps in the time-series data using plausible values using covariates information (year, population, GDP, and crop area). After the imputation, we downscaled the national consumption data to a gridded cropland map. Also, we applied the multiple imputation method to the available chemical fertilizer species consumption, allowing for the estimation of the NH4+ ∕ NO3− ratio in national fertilizer consumption. In this study, the synthetic N fertilizer inputs in 2000 showed a general consistency with the existing N fertilizer map (Potter et al., 2010) in relation to the ranges of N fertilizer inputs. Globally, the estimated N fertilizer inputs based on the sum of filled data increased from 15 to 110 Tg-N during 1961–2010. On the other hand, the global NO3− input started to decline after the late 1980s and the fraction of NO3− in global N fertilizer decreased consistently from 35 to 13 % over a 50-year period. NH4+-forming fertilizers are dominant in most countries; however, the NH4+ ∕ NO3− ratio in N fertilizer inputs shows clear differences temporally and geographically. This new map can be utilized as input data to global model studies and bring new insights for the assessment of historical terrestrial N cycling changes. Datasets available at doi:10.1594/PANGAEA.861203.
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Wulder, Michael A., Txomin Hermosilla, Graham Stinson, François A. Gougeon, Joanne C. White, David A. Hill und Byron P. Smiley. „Satellite-based time series land cover and change information to map forest area consistent with national and international reporting requirements“. Forestry: An International Journal of Forest Research 93, Nr. 3 (April 2020): 331–43. http://dx.doi.org/10.1093/forestry/cpaa006.
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Abstract Forests are dynamic ecosystems, subject to both natural and anthropogenic agents of change. Wildfire, harvesting and other human activities alter the tree-covered area present in forests. From national and international reporting perspectives, forests include areas currently treed, as well as those disturbed forest areas that are not currently treed but will be, given time for regeneration and the advancement of natural successional processes. As a consequence, forest area can be depicted at a particular point in time, informed by a retrospective temporal context. Using time series of Landsat imagery, annual land cover maps can be generated that are informed by knowledge of past disturbance history (such as wildfire and harvesting). In this research, we use over three decades of annual land cover data generated from Landsat time series to generate a spatially explicit estimate of the forest area of Canada in 2010. We demonstrate how land cover and disturbance information can be combined to map the area of ‘forest’, as defined by the Food and Agricultural Organization of the United Nations (FAO), within Canada’s 650 Mha of forested ecozones. Following this approach, we estimated Canada’s total forest area in 2010 to be 354.5 Mha. This estimate includes 324.5 Mha of current forest cover in 2010, plus an additional 33.2 Mha (or 9.4 per cent) of temporally informed forest area where tree cover had been temporarily lost due to fire or harvest, less 3.3 Mha that were removed to meet a definitional minimum size (0.5 ha) for contiguous forest area. Using Canada’s National Forest Inventory (NFI) as an independent reference source, the spatial agreement between the two estimates of forest area was ~84 per cent overall. Aspatially, the total area of the Landsat-derived estimate of 2010 forest area and the NFI baseline estimates differed by only 3 per cent, with notable regional differences in the wetland-dominated Hudson Plains Ecozone. Satellite-derived time series land cover and change information enable spatially explicit depictions of forest area (distinct from representations of forest cover) in a robust and transparent fashion, producing information of value to science, management and reporting information needs.
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Schellander, Harald, Michael Winkler und Tobias Hell. „Towards a reproducible snow load map – an example for Austria“. Advances in Science and Research 18 (05.08.2021): 135–44. http://dx.doi.org/10.5194/asr-18-135-2021.
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Abstract. The European Committee for Standardization defines zonings and calculation criteria for different European regions to assign snow loads for structural design. In the Alpine region these defaults are quite coarse; countries therefore use their own products, and inconsistencies at national borders are a common problem. A new methodology to derive a snow load map for Austria is presented, which is reproducible and could be used across borders. It is based on (i) modeling snow loads with the specially developed Δsnow model at 897 sophistically quality controlled snow depth series in Austria and neighboring countries and (ii) a generalized additive model where covariates and their combinations are represented by penalized regression splines, fitted to series of yearly snow load maxima derived in the first step. This results in spatially modeled snow load extremes. The new approach outperforms a standard smooth model and is much more accurate than the currently used Austrian snow load map when compared to the RMSE of the 50-year snow load return values through a cross-validation procedure. No zoning is necessary, and the new map's RMSE of station-wise estimated 50-year generalized extreme value (GEV) return levels gradually rises to 2.2 kN m−2 at an elevation of 2000 m. The bias is 0.18 kN m−2 and positive across all elevations. When restricting the range of validity of the new map to 2000 m elevation, negative bias values that significantly underestimate 50-year snow loads at a very small number of stations are the only objective problem that has to be solved before the new map can be proposed as a successor of the current Austrian snow load map.
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Hu, Luojia, Nan Xu, Jian Liang, Zhichao Li, Luzhen Chen und Feng Zhao. „Advancing the Mapping of Mangrove Forests at National-Scale Using Sentinel-1 and Sentinel-2 Time-Series Data with Google Earth Engine: A Case Study in China“. Remote Sensing 12, Nr. 19 (23.09.2020): 3120. http://dx.doi.org/10.3390/rs12193120.
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A high resolution mangrove map (e.g., 10-m), including mangrove patches with small size, is urgently needed for mangrove protection and ecosystem function estimation, because more small mangrove patches have disappeared with influence of human disturbance and sea-level rise. However, recent national-scale mangrove forest maps are mainly derived from 30-m Landsat imagery, and their spatial resolution is relatively coarse to accurately characterize the extent of mangroves, especially those with small size. Now, Sentinel imagery with 10-m resolution provides an opportunity for generating high-resolution mangrove maps containing these small mangrove patches. Here, we used spectral/backscatter-temporal variability metrics (quantiles) derived from Sentinel-1 SAR (Synthetic Aperture Radar) and/or Sentinel-2 MSI (Multispectral Instrument) time-series imagery as input features of random forest to classify mangroves in China. We found that Sentinel-2 (F1-Score of 0.895) is more effective than Sentinel-1 (F1-score of 0.88) in mangrove extraction, and a combination of SAR and MSI imagery can get the best accuracy (F1-score of 0.94). The 10-m mangrove map was derived by combining SAR and MSI data, which identified 20003 ha mangroves in China, and the area of small mangrove patches (<1 ha) is 1741 ha, occupying 8.7% of the whole mangrove area. At the province level, Guangdong has the largest area (819 ha) of small mangrove patches, and in Fujian, the percentage of small mangrove patches is the highest (11.4%). A comparison with existing 30-m mangrove products showed noticeable disagreement, indicating the necessity for generating mangrove extent product with 10-m resolution. This study demonstrates the significant potential of using Sentinel-1 and Sentinel-2 images to produce an accurate and high-resolution mangrove forest map with Google Earth Engine (GEE). The mangrove forest map is expected to provide critical information to conservation managers, scientists, and other stakeholders in monitoring the dynamics of the mangrove forest.
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Filipponi, Federico. „Exploitation of Sentinel-2 Time Series to Map Burned Areas at the National Level: A Case Study on the 2017 Italy Wildfires“. Remote Sensing 11, Nr. 6 (14.03.2019): 622. http://dx.doi.org/10.3390/rs11060622.
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Satellite data play a major role in supporting knowledge about fire severity by delivering rapid information to map fire-damaged areas in a precise and prompt way. The high availability of free medium-high spatial resolution optical satellite data, offered by the Copernicus Programme, has enabled the development of more detailed post-fire mapping. This research study deals with the exploitation of Sentinel-2 time series to map burned areas, taking advantages from the high revisit frequency and improved spatial and spectral resolution of the MSI optical sensor. A novel procedure is here presented to produce medium-high spatial resolution burned area mapping using dense Sentinel-2 time series with no a priori knowledge about wildfire occurrence or burned areas spatial distribution. The proposed methodology is founded on a threshold-based classification based on empirical observations that discovers wildfire fingerprints on vegetation cover by means of an abrupt change detection procedure. Effectiveness of the procedure in mapping medium-high spatial resolution burned areas at the national level was demonstrated for a case study on the 2017 Italy wildfires. Thematic maps generated under the Copernicus Emergency Management Service were used as reference products to assess the accuracy of the results. Multitemporal series of three different spectral indices, describing wildfire disturbance, were used to identify burned areas and compared to identify their performances in terms of spectral separability. Result showed a total burned area for the Italian country in the year 2017 of around 1400 km2, with the proposed methodology generating a commission error of around 25% and an omission error of around 40%. Results demonstrate how the proposed procedure allows for the medium-high resolution mapping of burned areas, offering a benchmark for the development of new operational downstreaming services at the national level based on Copernicus data for the systematic monitoring of wildfires.
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Marinova, Silvia T. „New Map Symbol System for Disaster Management“. Proceedings of the ICA 1 (16.05.2018): 1–6. http://dx.doi.org/10.5194/ica-proc-1-74-2018.
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In the last 10 years Bulgaria was frequently affected by natural and man-made disasters that caused considerable losses. According to the Bulgarian Disaster Management Act (2006) disaster management should be planned at local, regional and national level. Disaster protection is based on plans that include maps such as hazard maps, maps for protection, maps for evacuation planning, etc. Decision-making and cooperation between two or more neighboring municipalities or regions in crisis situation are still rendered difficult because the maps included in the plans differ in scale, colors, map symbols and cartographic design. To improve decision-making process in case of emergency and to reduce the number of human loss and property damages disaster management plans at local and regional level should be supported by detailed thematic maps created in accordance with uniform contents, map symbol system and design. The paper proposes a new symbol system for disaster management that includes a four level hierarchical classification of objects and phenomena according to their type and origin. All objects and phenomena of this classification are divided into five categories: disasters; infrastructure; protection services and infrastructure for protection; affected people and affected infrastructure; operational sites and activities. The symbols of these categories are shown with different background colors and shapes so that they are identifiable. All the symbols have simple but associative design. The new symbol system is used in the design of a series of maps for disaster management at local and regional level.
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Destegul, Umut, Grant Dellow und David Heron. „A ground shaking amplification map for New Zealand“. Bulletin of the New Zealand Society for Earthquake Engineering 42, Nr. 2 (30.06.2009): 122–28. http://dx.doi.org/10.5459/bnzsee.42.2.122-128.
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A ground shaking amplification map of New Zealand has been compiled from data held by GNS Science. The resulting map is being used in RiskScape, a tool for comparing risks at a given site from a variety of hazards by estimating potential losses.
A GIS-based geological map with national coverage has been composed from several sources, and is used as the base data. Geological maps from the QMAP project (an ongoing project to digitally compile 1:250,000 geological maps for all of New Zealand) have been used where available, supplemented with detailed geological maps at scales ranging from 1:25,000 to 1:50,000 for the larger urban areas. Gaps in the QMAP series have been filled by the 1:1,000,000 ‘Geological Map of New Zealand’.
Every geological polygon in the composite geological map has been assigned one of the ground shaking amplification (or site) classes from the New Zealand Standard for Structural Design Actions – Earthquake actions (NZS 1170.5) to produce the result map. These conform to the site class definitions in NZS 1170.5, which describes five classes with respect to ground shaking amplification. Assignment of these classes was straightforward for rock sites but more involved for soils where, for example, at boundaries between weak rock and deep soil sites a buffer zone of shallow soil was applied.
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Batori, Anna. „“Everything is Connected”“. VIEW Journal of European Television History and Culture 10, Nr. 19 (24.06.2021): 112. http://dx.doi.org/10.18146/view.246.
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The paper discusses the storytelling formulas of the first season of the German series Dark (2017–2020) by focusing on the key temporal and spatial aspects of seriality in the show, such as the time frame of diegesis (story time), the temporal structure of the story (discourse and narration time) and the unique temporal installation of the series. As argued, the story and visual textuality of Dark not only transcends time and space – thus to provide us with a complex narrative set – but, by atemporal and spatial storytelling jumps, it creates a map of inconsistencies of double discontinuity fairly new to television and serial narration. By focusing on these spatial-temporal aspects of the series, the paper sketches a new approach to postmodern television formulas, while it also offers a possible interpretation to the national characteristics of the production based on the recurring theme of captivity in time.
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Guo, Ziyan, Kang Yang, Chang Liu, Xin Lu, Liang Cheng und Manchun Li. „Mapping National-Scale Croplands in Pakistan by Combining Dynamic Time Warping Algorithm and Density-Based Spatial Clustering of Applications with Noise“. Remote Sensing 12, Nr. 21 (06.11.2020): 3644. http://dx.doi.org/10.3390/rs12213644.
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Croplands are commonly mapped using time series of remotely sensed images. The dynamic time warping (DTW) algorithm is an effective method for realizing this. However, DTW algorithm faces the challenge of capturing complete and accurate representative cropland time series on a national scale, especially in Asian countries where climatic and topographic conditions, cropland types, and crop growth patterns vary significantly. This study proposes an automatic cropland extraction method based on the DTW algorithm and density-based spatial clustering of applications with noise (DBSCAN), hereinafter referred to as ACE-DTW, to map croplands in Pakistan in 2015. First, 422 frames of multispectral Landsat-8 satellite images were selected from the Google Earth Engine to construct monthly normalized difference vegetation index (NDVI) time series. Next, a total of 2409 training samples of six land cover types were generated randomly and explained visually using high-resolution remotely sensed images. Then, a multi-layer DBSCAN was used to classify NDVI time series of training samples into different categories automatically based on their pairwise DTW distances, and the mean NDVI time series of each category was used as the standard time series to represent the characteristics of that category. These standard time series attempted to represent cropland information and maximally distinguished croplands from other possible interference land cover types. Finally, image pixels were classified as cropland or non-cropland based on their DTW distances to the standard time series of the six land cover types. The overall cropland extraction accuracy of ACE-DTW was 89.7%, which exceeded those of other supervised classifiers (classification and regression trees: 78.2%; support vector machines: 78.8%) and existing global cropland datasets (Finer Resolution Observation and Monitoring of Global Land Cover: 87.1%; Global Food Security Support Analysis Data: 83.1%). Further, ACE-DTW could produce relatively complete time series of variable cropland types, and thereby provide a significant advantage in mountain regions with small, fragmented croplands and plain regions with large, high-density patches of croplands.
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Dyer, Jamie L., und Reggina Cabrera Garza. „A Comparison of Precipitation Estimation Techniques over Lake Okeechobee, Florida“. Weather and Forecasting 19, Nr. 6 (01.12.2004): 1029–43. http://dx.doi.org/10.1175/824.1.
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Abstract Lake Okeechobee, located in southern Florida, is an important component in the regional hydrologic system. Currently, the Southeast River Forecast Center (SERFC) is setting up a forecasting scheme for Lake Okeechobee and its major inflows. An important aspect in calibrating the system is estimating the depth of direct precipitation over the water surface. Within this project, National Weather Service (NWS) and South Florida Water Management District (SFWMD) surface gauges, along with stage III multisensor precipitation estimates, are used to create time series of mean areal precipitation (MAP). The computed MAP values are compared in order to find the relative differences between them, and to determine the utility of using each data source for calibration and in future operations. It was found that the SFWMD gauge-based MAP was the most useful data source, because it had a suitable period of record and the SFWMD gauges had a better spatial sampling of precipitation over the lake surface. The radar-based stage III estimates were not found to be a useful source of data, despite the superior spatial sampling resolution, because they had too short a period of record and a number of changes in the processing algorithms made the associated MAP nonhomogeneous and inappropriate for model calibration.
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Saunders, Donald F., Stephen A. Terry und C. Keith Thompson. „Test of National Uranium Resource Evaluation gamma‐ray spectral data in petroleum reconnaissance“. GEOPHYSICS 52, Nr. 11 (November 1987): 1547–56. http://dx.doi.org/10.1190/1.1442271.
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Advances in interpretation techniques have made possible effective use of aerial high‐sensitivity gamma‐ray spectral data to explore for petroleum in selected environments. These data were collected by the U.S. Department of Energy during the National Uranium Resource Evaluation (NURE) program throughout the conterminous U.S. and most of Alaska between 1974 and 1981. The tests reported here were limited to portions of the following 1 degree by 2 degree National Topographic Map Series (NTMS) quadrangles: the west half of the Palestine quadrangle, the east half of the San Angelo quadrangle, and the southeast quarter of the Big Spring quadrangle, all of which are in Texas. The radiometric uranium and potassium data were normalized for surface lithology (including soil differences), as well as for variations in counting geometry and hydrologic conditions, using a new technique based on thorium measurements and geochemical relationships between thorium and potassium and between thorium and the uranium series. Uncontrolled effects of these variables have made many previous attempts at applying radiometric methods in petroleum prospecting essentially meaningless. The thorium‐based normalization approach described here resulted in anomalously low adjusted potassium values over most of the oil fields considered. Adjusted uranium analyses showed low anomalies over oil in east Texas and high anomalies in west Texas. The reasons for the different behavior of the uranium data are poorly understood, but they are attributed tentatively to the effects of the different climates on the distribution of the uranium series elements in very near‐surface soils. This application of high‐sensitivity gamma‐ray spectrometry has regional advantages and limitations, which depend on the nature, origin, moisture content, and possible shielding cover of the surface soils. If these factors are carefully considered, the NURE radiometric data offer promise as an inexpensive reconnaissance guide to help locate new onshore oil and gas prospects or possible field extensions in the East Texas Basin, the west Texas area, and similar environments.
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Patakamuria, S. K., S. Agrawal und M. Krishnaveni. „Time-Series analysis of MODIS NDVI data along with ancillary data for Land use/Land cover mapping of Uttarakhand“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (23.12.2014): 1491–500. http://dx.doi.org/10.5194/isprsarchives-xl-8-1491-2014.
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Land use and land cover plays an important role in biogeochemical cycles, global climate and seasonal changes. Mapping land use and land cover at various spatial and temporal scales is thus required. Reliable and up to date land use/land cover data is of prime importance for Uttarakhand, which houses twelve national parks and wildlife sanctuaries and also has a vast potential in tourism sector. The research is aimed at mapping the land use/land cover for Uttarakhand state of India using Moderate Resolution Imaging Spectroradiometer (MODIS) data for the year 2010. The study also incorporated smoothening of time-series plots using filtering techniques, which helped in identifying phenological characteristics of various land cover types. Multi temporal Normalized Difference Vegetation Index (NDVI) data for the year 2010 was used for mapping the Land use/land cover at 250m coarse resolution. A total of 23 images covering a single year were layer stacked and 150 clusters were generated using unsupervised classification (ISODATA) on the yearly composite. To identify different types of land cover classes, the temporal pattern (or) phenological information observed from the MODIS (MOD13Q1) NDVI, elevation data from Shuttle Radar Topography Mission (SRTM), MODIS water mask (MOD44W), Nighttime Lights Time Series data from Defense Meteorological Satellite Program (DMSP) and Indian Remote Sensing (IRS) Advanced Wide Field Sensor (AWiFS) data were used. Final map product is generated by adopting hybrid classification approach, which resulted in detailed and accurate land use and land cover map.
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Estupinan-Suarez, L. M., C. Florez-Ayala, M. J. Quinones, A. M. Pacheco und A. C. Santos. „Detection and characterizacion of Colombian wetlands using Alos Palsar and MODIS imagery“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-7/W3 (29.04.2015): 375–82. http://dx.doi.org/10.5194/isprsarchives-xl-7-w3-375-2015.
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Wetlands regulate the flow of water and play a key role in risk management of extreme flooding and drought. In Colombia, wetland conservation has been a priority for the government. However, there is an information gap neither an inventory nor a national baseline map exists. In this paper, we present a method that combines a wetlands thematic map with remote sensing derived data, and hydrometeorological stations data in order to characterize the Colombian wetlands. Following the adopted definition of wetlands, available spatial data on land forms, soils and vegetation was integrated in order to characterize spatially the occurrence of wetlands. This data was then complemented with remote sensing derived data from active and passive sensors. A flood frequency map derived from dense time series analysis of the ALOS PALSAR FBD /FBS data (2007-2010) at 50m resolution was used to analyse the recurrence of flooding. In this map, flooding under the canopy and open water classes could be mapped due to the capabilities of the L-band radar. In addition, MODIS NDVI profiles (2007-2012) were used to characterize temporally water mirrors and vegetation, founding different patterns at basin levels. Moreover, the Colombian main basins were analysed and typified based on hydroperiods, highlighting different hydrological regimes within each basin. The combination of thematic maps, SAR data, optical imagery and hydrological data provided information on the spatial and temporal dynamics of wetlands at regional scales. Our results provide the first validated baseline wetland map for Colombia, this way providing valuable information for ecosystem management.
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Stech, Marko Robert. „Lidia Stefanowska, compiler and editor. Antologia tekstów źródłowych [Anthology of Primary Sources].“ East/West: Journal of Ukrainian Studies 5, Nr. 1 (23.03.2018): 185–88. http://dx.doi.org/10.21226/ewjus377.
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Review of Lidia Stefanowska, compiler and editor. Antologia tekstów źródłowych [Anthology of Primary Sources]. 2014. Mission Impossible: MUR i odrodzenie ukraińskiego życia literackiego w obozach dla uchodźców na terytorium Niemiec 1945-1948 [Mission Impossible: MUR and the Revival of Ukrainian Literary Life in Displaced Persons Camps on the Territory of Germany 1945-1948], part 2, Uniwersytet Warszawski, Katedra Ukrainistyki, 2013-14. Seria monograficzna Katedry Ukrainistyki UW oraz Uniwersytetu Przykarpackiego im. W. Stefanyka w Iwano-Frankiwsku [Monograph Series of the Chair of Ukrainian Studies of the University of Warsaw and the V. Stefanyk Precarpathian National University in Ivano-Frankivsk] 5, edited by Katarzyna Jakubowska-Krawczyk and Stefanowska. 656 pp. Illustrations. Map. Bibliography of First Editions. List of Sources. Paper.
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Löw, Markus, und Tatjana Koukal. „Phenology Modelling and Forest Disturbance Mapping with Sentinel-2 Time Series in Austria“. Remote Sensing 12, Nr. 24 (21.12.2020): 4191. http://dx.doi.org/10.3390/rs12244191.
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Worldwide, forests provide natural resources and ecosystem services. However, forest ecosystems are threatened by increasing forest disturbance dynamics, caused by direct human activities or by altering environmental conditions. It is decisive to reconstruct and trace the intra- to transannual dynamics of forest ecosystems. National to local forest authorities and other stakeholders request detailed area-wide maps that delineate forest disturbance dynamics at various spatial scales. We developed a time series analysis (TSA) framework that comprises data download, data management, image preprocessing and an advanced but flexible TSA. We use dense Sentinel-2 time series and a dynamic Savitzky–Golay-filtering approach to model robust but sensitive phenology courses. Deviations from the phenology models are used to derive detailed spatiotemporal information on forest disturbances. In a first case study, we apply the TSA to map forest disturbances directly or indirectly linked to recurring bark beetle infestation in Northern Austria. In addition to spatially detailed maps, zonal statistics on different spatial scales provide aggregated information on the extent of forest disturbances between 2018 and 2019. The outcomes are (a) area-wide consistent data of individual phenology models and deduced phenology metrics for Austrian forests and (b) operational forest disturbance maps, useful to investigate and monitor forest disturbances to facilitate sustainable forest management.
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Stow, Douglas, Madhura Niphadkar und John Kaiser. „Time series of chaparral live fuel moisture maps derived from MODIS satellite data“. International Journal of Wildland Fire 15, Nr. 3 (2006): 347. http://dx.doi.org/10.1071/wf05060.
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Wildfires in chaparral shrublands of southern California are a major hazard and important ecological disturbance agent. Fire managers typically monitor fuel moisture of chaparral shrublands to assess the risk of wildfires, using field-based sampling methods for a few small study areas located sparsely throughout southern California. Remote sensing provides the potential for deriving spatially explicit and temporally frequent data on live fuel moisture (LFM) conditions. The objective of this present study was to explore the potential for monitoring LFM with maps derived from Moderate Resolution Imaging Spectroradiometer (MODIS) data on the National Aeronautics and Space Administration (NASA) Terra Earth-observing satellite. A time series of MODIS surface reflectance data (MOD-09_A1) for San Diego County, California from Fall 2000 through 2003 was used to derive normalized difference indices, which were regressed against LFM data. A high degree of temporal co-variability was found, with three MODIS indices providing similar predictability. Regression relationships were inverted and applied to MODIS images to map LFM interval classes for chaparral areas of San Diego County. The spatial–temporal patterns of LFM maps suggest that, at a minimum, the MODIS can provide spatially explicit information that extends the utility of ground-based measurements of LFM data at a few sites.
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Li, He, Dongjie Fu, Chong Huang, Fenzhen Su, Qingsheng Liu, Gaohuan Liu und Shangrong Wu. „An Approach to High-Resolution Rice Paddy Mapping Using Time-Series Sentinel-1 SAR Data in the Mun River Basin, Thailand“. Remote Sensing 12, Nr. 23 (03.12.2020): 3959. http://dx.doi.org/10.3390/rs12233959.
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Timely and accurate regional rice paddy monitoring plays a significant role in maintaining the sustainable rice production, food security, and agricultural development. This study proposes an operational automatic approach to mapping rice paddies using time-series SAR data. The proposed method integrates time-series Sentinel-1 data, auxiliary data of global surface water, and rice phenological characteristics with Google Earth Engine cloud computing platform. A total of 402 Sentinel-1 scenes from 2017 were used for mapping rice paddies extent in the Mun River basin. First, the calculated minimum and maximum values of the backscattering coefficient of permanent water (a classification type within global surface water data) in a year was used as the threshold range for extracting the potential extent. Then, three rice phenological characteristics were extracted based on the time-series curve of each pixel, namely the date of the beginning of the season (DBS), date of maximum backscatter during the peak growing season (DMP), and length of the vegetative stage (LVS). After setting a threshold for each phenological parameter, the final rice paddy extent was identified. Rice paddy map produced in this study was highly accurate and agreed well with field plot data and rice map products from the International Rice Research Institute (IRRI). The results had a total accuracy of 89.52% and an F1 score of 0.91, showing that the spatiotemporal pattern of extracted rice cover was consistent with ground truth samples in the Mun River basin. This approach could be expanded to other rice-growing regions at the national scale, or even the entire Indochina Peninsula and Southeast Asia.
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Debella-Gilo, Misganu, und Arnt Kristian Gjertsen. „Mapping Seasonal Agricultural Land Use Types Using Deep Learning on Sentinel-2 Image Time Series“. Remote Sensing 13, Nr. 2 (15.01.2021): 289. http://dx.doi.org/10.3390/rs13020289.
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The size and location of agricultural fields that are in active use and the type of use during the growing season are among the vital information that is needed for the careful planning and forecasting of agricultural production at national and regional scales. In areas where such data are not readily available, an independent seasonal monitoring method is needed. Remote sensing is a widely used tool to map land use types, although there are some limitations that can partly be circumvented by using, among others, multiple observations, careful feature selection and appropriate analysis methods. Here, we used Sentinel-2 satellite image time series (SITS) over the land area of Norway to map three agricultural land use classes: cereal crops, fodder crops (grass) and unused areas. The Multilayer Perceptron (MLP) and two variants of the Convolutional Neural Network (CNN), are implemented on SITS data of four different temporal resolutions. These enabled us to compare twelve model-dataset combinations to identify the model-dataset combination that results in the most accurate predictions. The CNN is implemented in the spectral and temporal dimensions instead of the conventional spatial dimension. Rather than using existing deep learning architectures, an autotuning procedure is implemented so that the model hyperparameters are empirically optimized during the training. The results obtained on held-out test data show that up to 94% overall accuracy and 90% Cohen’s Kappa can be obtained when the 2D CNN is applied on the SITS data with a temporal resolution of 7 days. This is closely followed by the 1D CNN on the same dataset. However, the latter performs better than the former in predicting data outside the training set. It is further observed that cereal is predicted with the highest accuracy, followed by grass. Predicting the unused areas has been found to be difficult as there is no distinct surface condition that is common for all unused areas.
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Toker, M., E. Çolak und F. Sunar. „SPATIOTEMPORAL CHANGE ANALYSIS OF THE PROTECTED AREAS: A CASE STUDY – İĞNEADA FLOODPLAIN FORESTS“. International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B3-2021 (29.06.2021): 735–40. http://dx.doi.org/10.5194/isprs-archives-xliii-b3-2021-735-2021.
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Abstract. Protected areas are important with land or water body ecosystems that have biodiversity, flora and fauna species. In Turkey, National Parks are one of the protected areas managed according to the National Parks Law No. 2873. Among them, the İğneada Floodplain Forests National Park, located in İğneada town in the province of Kırklareli, Turkey has been declared as a national park in 2007, and has an importance being a rare ecosystem, which consists of wetland, swamp, lakes and coastal sand dunes. Planning of Protected Areas can be done in a variety of ways, taking into account the balance of protection/use and should follow policies and guidelines. Today, for the sustainability and effective management of forest ecosystems, remote sensing technology provides an effective tool for assessing and monitoring ecosystem health at different temporal and spatial scales. In this study, potential temporal changes in the National Park were analyzed with Landsat satellite time series images using two different methods. First method, the Landtrendr algorithm (Landsat-based Detection of Trends in Disturbance and Recovery) developed for multitemporal satellite data, uses pixel values as input data and analysis them by using regression models to capture, label and map the changes. In this context, Landsat satellite time series images were taken quinquennial between 1987 and 2007 and biennially until 2017 for Landtrendr analysis (i.e. before and after its declaration as a National Park, respectively). As a second approach, the Google Earth Engine (GEE) cloud-based platform, which facilitates access to high-performance computing resources to process large long-term data sets, was used to analyze the impact of land cover changes. The results showed that the area was subjected to various pressures (i.e. due to illegal felling, pollution, etc.) until it was declared as a National park. Although there was general improvement and recovery after the region declared as a Park, it was seen that the sensitive dynamics of the region require continuous monitoring and protection using geo-information technologies.
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Doko, T., W. Chen, K. Sasaki und T. Furutani. „AN ATTEMPT TO DEVELOP AN ENVIRONMENTAL INFORMATION SYSTEM OF ECOLOGICAL INFRASTRUCTURE FOR EVALUATING FUNCTIONS OF ECOSYSTEM-BASED SOLUTIONS FOR DISASTER RISK REDUCTION (ECO-DRR)“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B8 (22.06.2016): 43–49. http://dx.doi.org/10.5194/isprsarchives-xli-b8-43-2016.
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“Ecological Infrastructure (EI)” are defined as naturally functioning ecosystems that deliver valuable services to people, such as healthy mountain catchments, rivers, wetlands, coastal dunes, and nodes and corridors of natural habitat, which together form a network of interconnected structural elements in the landscape. On the other hand, natural disaster occur at the locations where habitat was reduced due to the changes of land use, in which the land was converted to the settlements and agricultural cropland. Hence, habitat loss and natural disaster are linked closely. Ecological infrastructure is the nature-based equivalent of built or hard infrastructure, and is as important for providing services and underpinning socio-economic development. Hence, ecological infrastructure is expected to contribute to functioning as ecological disaster reduction, which is termed Ecosystem-based Solutions for Disaster Risk Reduction (Eco-DRR). Although ecological infrastructure already exists in the landscape, it might be degraded, needs to be maintained and managed, and in some cases restored. Maintenance and restoration of ecological infrastructure is important for security of human lives. Therefore, analytical tool and effective visualization tool in spatially explicit way for the past natural disaster and future prediction of natural disaster in relation to ecological infrastructure is considered helpful. Hence, Web-GIS based Ecological Infrastructure Environmental Information System (EI-EIS) has been developed. This paper aims to describe the procedure of development and future application of EI-EIS. The purpose of the EI-EIS is to evaluate functions of Eco-DRR. In order to analyse disaster data, collection of past disaster information, and disaster-prone area is effective. First, a number of digital maps and analogue maps in Japan and Europe were collected. In total, 18,572 maps over 100 years were collected. The Japanese data includes Future-Pop Data Series (1,736 maps), JMC dataset 50m grid (elevation) (13,071 maps), Old Edition Maps: Topographic Map (325 maps), Digital Base Map at a scale of 2500 for reconstruction planning (808 maps), Detailed Digital Land Use Information for Metropolitan Area (10 m land use) (2,436 maps), and Digital Information by GSI (national large scale map) (71 maps). Old Edition Maps: Topographic Map were analogue maps, and were scanned and georeferenced. These geographical area covered 1) Tohoku area, 2) Five Lakes of Mikata area (Fukui), 3) Ooshima Island (Tokyo), 4) Hiroshima area (Hiroshima), 5) Okushiri Island (Hokkaido), and 6) Toyooka City area (Hyogo). The European data includes topographic map in Germany (8 maps), old topographic map in Germany (31 maps), ancient map in Germany (23 maps), topographic map in Austria (9 maps), old topographic map in Austria (17 maps), and ancient map in Austria (37 maps). Second, focusing on Five Lakes of Mikata area as an example, these maps were integrated into the ArcGIS Online® (ESRI). These data can be overlaid, and time-series data can be visualized by a time slider function of ArcGIS Online.
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Doko, T., W. Chen, K. Sasaki und T. Furutani. „AN ATTEMPT TO DEVELOP AN ENVIRONMENTAL INFORMATION SYSTEM OF ECOLOGICAL INFRASTRUCTURE FOR EVALUATING FUNCTIONS OF ECOSYSTEM-BASED SOLUTIONS FOR DISASTER RISK REDUCTION (ECO-DRR)“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B8 (22.06.2016): 43–49. http://dx.doi.org/10.5194/isprs-archives-xli-b8-43-2016.
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“Ecological Infrastructure (EI)” are defined as naturally functioning ecosystems that deliver valuable services to people, such as healthy mountain catchments, rivers, wetlands, coastal dunes, and nodes and corridors of natural habitat, which together form a network of interconnected structural elements in the landscape. On the other hand, natural disaster occur at the locations where habitat was reduced due to the changes of land use, in which the land was converted to the settlements and agricultural cropland. Hence, habitat loss and natural disaster are linked closely. Ecological infrastructure is the nature-based equivalent of built or hard infrastructure, and is as important for providing services and underpinning socio-economic development. Hence, ecological infrastructure is expected to contribute to functioning as ecological disaster reduction, which is termed Ecosystem-based Solutions for Disaster Risk Reduction (Eco-DRR). Although ecological infrastructure already exists in the landscape, it might be degraded, needs to be maintained and managed, and in some cases restored. Maintenance and restoration of ecological infrastructure is important for security of human lives. Therefore, analytical tool and effective visualization tool in spatially explicit way for the past natural disaster and future prediction of natural disaster in relation to ecological infrastructure is considered helpful. Hence, Web-GIS based Ecological Infrastructure Environmental Information System (EI-EIS) has been developed. This paper aims to describe the procedure of development and future application of EI-EIS. The purpose of the EI-EIS is to evaluate functions of Eco-DRR. In order to analyse disaster data, collection of past disaster information, and disaster-prone area is effective. First, a number of digital maps and analogue maps in Japan and Europe were collected. In total, 18,572 maps over 100 years were collected. The Japanese data includes Future-Pop Data Series (1,736 maps), JMC dataset 50m grid (elevation) (13,071 maps), Old Edition Maps: Topographic Map (325 maps), Digital Base Map at a scale of 2500 for reconstruction planning (808 maps), Detailed Digital Land Use Information for Metropolitan Area (10 m land use) (2,436 maps), and Digital Information by GSI (national large scale map) (71 maps). Old Edition Maps: Topographic Map were analogue maps, and were scanned and georeferenced. These geographical area covered 1) Tohoku area, 2) Five Lakes of Mikata area (Fukui), 3) Ooshima Island (Tokyo), 4) Hiroshima area (Hiroshima), 5) Okushiri Island (Hokkaido), and 6) Toyooka City area (Hyogo). The European data includes topographic map in Germany (8 maps), old topographic map in Germany (31 maps), ancient map in Germany (23 maps), topographic map in Austria (9 maps), old topographic map in Austria (17 maps), and ancient map in Austria (37 maps). Second, focusing on Five Lakes of Mikata area as an example, these maps were integrated into the ArcGIS Online® (ESRI). These data can be overlaid, and time-series data can be visualized by a time slider function of ArcGIS Online.
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Obata, Shingo, Pete Bettinger, Chris J. Cieszewski und Roger C. Lowe III. „Mapping Forest Disturbances between 1987–2016 Using All Available Time Series Landsat TM/ETM+ Imagery: Developing a Reliable Methodology for Georgia, United States“. Forests 11, Nr. 3 (17.03.2020): 335. http://dx.doi.org/10.3390/f11030335.
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Forest resources have a high economic value in the State of Georgia (USA) and the landscape is frequently disturbed as a part of forest management activities, such as plantation forest management activities. Thus, tracking the stand-clearing disturbance history in a spatially referenced manner might be pivotal in discussions of forest resource sustainability within the State. The two major objectives of this research are (i) to develop and test a reliable methodology for statewide tracking of forest disturbances in Georgia, (ii) to consider and discuss the use and implications of the information derived from the forest disturbance map. Two primary disturbance detection methods, a threshold algorithm and a statistical boundary method, were combined to develop a robust estimation of recent forest disturbance history. The developed model was used to create a forest disturbance record for the years 1987–2016, through the use of all available Landsat Thematic Mapper (TM)/Enhanced Thematic Mapper (ETM+) data. The final product was a raster database, where each pixel was assigned a value corresponding to the last disturbance year. The overall accuracy of the forest disturbance map was 87%, and it indicated that 4,503,253 ha, equivalent to 29.2% of the total land area in Georgia, experienced disturbances between 1987 and 2016. The estimated disturbed area in each year was highly variable and ranged between 84,651 ha (±36,354 ha) to 211,780 ha (±49,504 ha). By combining the use of the disturbance map along with the 2016 database from the National Land Cover Database (NLCD), we also analyzed the regional variation in the disturbance history. This analysis indicated that disturbed forests in urban areas were more likely to be converted to other land-uses. The forest disturbance record created in this research provides the necessary spatial data and address forest resource sustainability in Georgia. Additionally, the methodology used has application in the analysis of other resources, such as the estimation of the aboveground forest biomass.
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Ibrahim, Balzter, Mathieu und Tsutsumida. „Impact of Soil Reflectance Variation Correction on Woody Cover Estimation in Kruger National Park Using MODIS Data“. Remote Sensing 11, Nr. 8 (12.04.2019): 898. http://dx.doi.org/10.3390/rs11080898.
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Time-series of imagery acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) has previously been used to estimate woody and herbaceous vegetation cover in savannas. However, this is challenging due to the mixture of woody and herbaceous plant functional types with specific contributions to the phenological signal and variations in soil background reflectance signatures observed from satellite. These factors cause variations in the accuracy and precision of woody cover estimates from different modelling approaches and datasets. Here, woody cover is estimated over Kruger National Park (KNP) from the MODIS 16-day composite time-series data using dry season NDVI/SAVI images and applying NDVIsoil determination methods. The woody cover estimates when NDVIsoil was ignored had R² = 0.40, p < 0.01, slope = 1.01, RMSE (root mean square error) = 15.26% and R² = 0.32, p < 0.03, slope = 0.79, RMSE = 16.39% for NDVIpixel and SAVIpixel, respectively, when compared to field plot data of plant functional type fractional cover. The woody cover estimated from the soil determination methods had a slope closer to 1 for both NDVI and SAVI but also a slightly higher RMSE. For a soil-invariant method, RMSE = 19.04% and RMSE = 17.34% were observed for NDVI and SAVI respectively, while for a soil-variant method, RMSE = 18.28% and RMSE = 19.17% were found for NDVI and SAVI. The woody cover estimated from all models had a high correlation and significant relationship with LiDAR/SAR based estimates and a woody cover map produced by Bucini. Woody cover maps are required for vegetation succession monitoring, grazing impact assessment, climate change mitigation and adaptation research and dynamic vegetation model validation.
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Cordell, Karl. „Politics and Society in Upper Silesia Today: The German Minority Since 1945“. Nationalities Papers 24, Nr. 2 (Juni 1996): 269–85. http://dx.doi.org/10.1080/00905999608408441.
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In 1919, Polish nationalist forces led by Josef Pilsudski succeeded in re-establishing an independent Polish state. Poland had disappeared from the map of Europe in 1794 following the third partition. It had been devoured by its traditional enemies; Prussia, Austria and Russia. Historically, Poland had been a state without fixed borders, and via a combination of changing dynastic alliances and a pattern of eastward migration, from the twelfth century formerly Slav areas east of the rivers Oder and Neisse became progressively germanicized. By 1921, following the end of World War I, several peace conferences, and after a series of referenda in disputed (former) German areas and a series of wars with all of its neighbors, including an especially successfully prosecuted war against the embryonic Soviet Union, the new state had managed to become a state which incorporated virtually all ethnic Poles. However, in addition to incorporating the overwhelming majority of ethnic Poles, the borders of the new Polish state also included huge numbers of other ethnic, religious and national groups.
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Ni, Hao, Peng Gong und Xuecao Li. „Extraction of Old Towns in Hangzhou (2000–2018) from Landsat Time Series Image Stacks“. Remote Sensing 13, Nr. 13 (22.06.2021): 2438. http://dx.doi.org/10.3390/rs13132438.
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With rapid urbanization in recent decades, more and more urban renewal has taken place in China. Meanwhile, the early developed areas without change have become old towns, which need special attention in future city planning. However, other than field surveys, there is no specific method to identify old towns. To fill this gap, we used time-series image stacks established from Landsat Surface Reflectance Tier 1 data on the Google Earth Engine (GEE) platform, facilitated by Global Urban Boundary (GUB), Essential Urban Land Use Categories (EULUC) and Global Artificial Impervious Area (GAIA) data. The LandTrendr change detection algorithm was applied to extract detailed information from 14 band/index trajectories. These features were then used as inputs to two methods of old town identification: statistical thresholding and random forest classification. We assessed these two methods in a rapidly developing large city, Hangzhou, and subsequently obtained overall accuracies of 81.33% and 90.67%, respectively. Red band, NIR band and related indices show higher importance in random forest classification, and the magnitude feature plays an outstanding role. The final map of Hangzhou during the 2000–2018 period shows that the old towns were concentrated in the downtown region near West Lake within the urban boundaries in 2000, and far fewer than the renewed areas. The results could serve as references in the provincial and national planning of future urban developments.
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McCarthy, Matthew J., Brita Jessen, Michael J. Barry, Marissa Figueroa, Jessica McIntosh, Tylar Murray, Jill Schmid und Frank E. Muller-Karger. „Automated High-Resolution Time Series Mapping of Mangrove Forests Damaged by Hurricane Irma in Southwest Florida“. Remote Sensing 12, Nr. 11 (28.05.2020): 1740. http://dx.doi.org/10.3390/rs12111740.
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In September of 2017, Hurricane Irma made landfall within the Rookery Bay National Estuarine Research Reserve of southwest Florida (USA) as a category 3 storm with winds in excess of 200 km h−1. We mapped the extent of the hurricane’s impact on coastal land cover with a seasonal time series of satellite imagery. Very high-resolution (i.e., <5 m pixel) satellite imagery has proven effective to map wetland ecosystems, but challenges in data acquisition and storage, algorithm training, and image processing have prevented large-scale and time-series mapping of these data. We describe our approach to address these issues to evaluate Rookery Bay ecosystem damage and recovery using 91 WorldView-2 satellite images collected between 2010 and 2018 mapped using automated techniques and validated with a field campaign. Land cover was classified seasonally at 2 m resolution (i.e., healthy mangrove, degraded mangrove, upland, soil, and water) with an overall accuracy of 82%. Digital change detection methods show that hurricane-related degradation was 17% of mangrove forest (~5 km2). Approximately 35% (1.7 km2) of this loss recovered one year after Hurricane Irma. The approach completed the mapping approximately 200 times faster than existing methods, illustrating the ease with which regional high-resolution mapping may be accomplished efficiently.
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Tucker, D. H., I. G. Hone, D. Downie, A. Luyendyk, K. Horsfall und V. Anfiloff. „Aeromagnetic regional survey of onshore Australia“. GEOPHYSICS 53, Nr. 2 (Februar 1988): 254–65. http://dx.doi.org/10.1190/1.1442460.
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The Australian Bureau of Mineral Resources (BMR) is responsible for the National Airborne Magnetic Database. This data base consists of results from approximately 3 500 000 line‐km of regional survey flying carried out over 35 years, recording total magnetic intensity. The magnetic data base is one of the most important geophysical data bases for Australia and is used extensively by the minerals and petroleum exploration industries. First‐pass coverage of onshore Australia is aimed for completion in 1992. This coverage contains data from surveys with a wide range of specifications, resulting in a wide range of data quality; some of the areas covered by poorer quality data may be reflown later. For the most part, the intention has been to acquire data at a continuous ground clearance of 150 m and with a line spacing of 1500 m. However, over some sedimentary basins, the line spacing is in excess of 3200 m. New color and grey‐scale (image processed type) digital magnetic maps (pixel maps) are in preparation; these will supersede the 1976 digital magnetic map of Australia, which was gridded on a 1.2 minute mesh (2000 m) mostly by digitizing contours on maps. The new map, produced from flight‐line data, will have a grid size of 0.25 minutes. Initially, a series of maps will be produced with each one covering a block of 4 degrees latitude by 6 degrees longitude, coinciding with standard 1 : 1 000 000 map sheets. An example included for the Adelaide 1 : 1 000 000 map sheet in Southern Australia shows a dramatic increase in the number of anomalies over those that were evident in earlier contour presentations.
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VAN DER WUSTEN, HERMAN. „Public authority in European capitals: a map of governance, an album with symbols“. European Review 12, Nr. 2 (Mai 2004): 143–58. http://dx.doi.org/10.1017/s1062798704000146.
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This paper deals with the residences of public authority across Europe from the emergence of the state system to the present. It is concerned with the addresses, the buildings, their surroundings and the symbolic significance from the point of view of builders and the public. The building styles have been heavily influenced by the examples of imperial and papal Rome, and a dominant model of a European capital city building has evolved. There are also some systematic differences, particularly for those countries with a dramatic history of constitutional change and for those with a decentralized process of state-building in the early stages of the process. In the second half of the 19th century, and probably again currently, the residences of public authority should be read in conjunction with the positioning of a series of civic institutions. The display of state authority has been increasingly accompanied by the representation of national identity. More recently, however, a touch of cosmopolitanism has been added in many capitals. The reading of these capitals is therefore now more ambiguous. This will probably intensify under the impact of the emerging European multilevel governance system. At the same time, this governance system has become increasingly based in Brussels. For this city to symbolically represent Europe is a very difficult ambition in the context of its multiple capital roles. However, Brussels has a long history of dealing successfully with such urban challenges in spite of major conflicts and drawbacks.
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Haft, Adele J. „Introduction to Maps and Mapping in Kenneth Slessor’s Poetic Sequence The Atlas“. Cartographic Perspectives, Nr. 70 (01.09.2011): 5–43. http://dx.doi.org/10.14714/cp70.42.
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This is the first of seven articles comprising a book-length treatment of The Atlas by the acclaimed Australian poet and journalist Kenneth Slessor (1901–1971). Hisreputation as Australia’s first modernist poet and pioneer of her national poeticidentity began with his 1932 collection Cuckooz Contrey, which opened with one ofthe most original interpretations of cartography in verse: the five-poem sequence The Atlas. Fascinated by maps and navigators’ tales, Slessor began each poem withthe title of a map or an atlas by a cartographer prominent during Europe’s “goldenage of cartography,” and then alluded to that particular work throughout thepoem. The sequence celebrates the cartographic achievements of the seventeenthcentury while imaginatively recreating the worlds portrayed in very differentmaps, including Robert Norton’s plan of Algiers (“The King of Cuckooz”), JohnOgilby’s road maps (“Post-roads”), Joan Blaeu’s plan-view of Amsterdam (“DutchSeacoast”), John Speed’s world map (“Mermaids”), and a map of the West Indies,supposedly by Nicolas or Adrien Sanson, featuring buccaneers and a seafight (“TheSeafight”). Yet none of these maps appears in Slessor’s collections or critical studiesof his work. Nor have his poems been juxtaposed with the atlases, maps, or rarecatalogue of maps that inspired them.I plan to fill these gaps in six future issues of Cartographic Perspectives. Fivewill begin with an Atlas poem—reprinted in its entirety and in the order ofits appearance within the sequence. Analysis of the poem’s content will befollowed by discussion of its introductory quote or epigraph, which Slessor (ashis poetry notebook makes clear) found in the map catalogue. Next comes anexamination of both the cartographer and the map highlighted in the epigraph.By reproducing the map as well as the catalogue’s description of the map, eacharticle will uncover the cartographic connections between Slessor’s publishedpoem and its manuscript versions, its map(s), and the map catalogue. AnEpilogue will round out my series by exploring the unique atlas-like structure ofSlessor’s sequence and identifying the likely author of the catalogue that Slessorcreatively transformed into The Atlas.My Introduction, the only part of the series published in this issue, providesthe background for what will become the first extended examination of The Atlas. Opening with a brief biography of Slessor as poet, journalist, and man-about-Sydney, it surveys Cuckooz Contrey before turning to The Atlas, which debuted inthat collection. The effort that Slessor lavished on his sequence and on masteringthe period in which it is set are revealed throughout the notebook in whichhe drafted all five poems. Reviewing his corpus shows that The Atlas uniquelycombines strategies apparent in Slessor’s earlier and later poems, includinghis emphasis on the arts and the use of illustrations to heighten his poetry’sallure. The Introduction presents the maps created to illustrate his poetry,especially Strange Lands, made by the famously controversial Norman Lindsayand featured as the frontispiece of Cuckooz Contrey. Slessor’s poetic allusionsto maps lead to the magnificent nautical library in which he may have foundthe inspiration for The Atlas. Yet, as the second half of this article demonstrates,that library collection has proved one of many challenges to producing thisgroundbreaking study.
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Liu, Xinxia, Anbing Zhang, Hefeng Wang und Haixin Liu. „Using multi-remote sensing data to assess Phragmites invasion of the Detroit river international wildlife refuge“. World Journal of Engineering 13, Nr. 1 (08.02.2016): 44–52. http://dx.doi.org/10.1108/wje-02-2016-016.
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Purpose This paper aims to develope an integrated image processing method to investigate the spatiotemporal dynamics of Phragmites invasion in the Detroit River International Wildlife Refuge on the basis of publically available sources. Design/methodology/approach This new approach integrates the standard time-series analysis of Landsat images with USDA National Agriculture Imagery Program (NAIP) imagery and USGS Digital Orthophoto Quarter Quads (DOQQ) datasets, which are either classified or manually interpreted with the aid of ground control points. Three different types of spatiotemporal dimensions are designed to test this integrated time-series image analysis method: the selected sites and selected time-points with high spatial resolution and sufficient validation data points, the intermediate time-series with continued yearly images and periodical validation data, and the long time-series with periodical images without enough validation data. The support vector machine (SVM) method was used to classify the Landast TM sequence images to detect the Phragmites invasion. Findings The habitat map produced by NAIP images and field collection data shows that the total Phragmites area of DRIWR in 2010 is 4221.87 acres without treatment areas and similar with the removed non-vegetation method. It is confirmed that the pre-classification method can obtain more accurate results. Originality value The test results show that the Landsat-5 data can be used for long-term environmental management and monitoring of Phragmites invasion and can achieve rehabilitation of invasion areas.
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Godinho Cassol, Henrique Luis, Egidio Arai, Edson Eyji Sano, Andeise Cerqueira Dutra, Tânia Beatriz Hoffmann und Yosio Edemir Shimabukuro. „Maximum Fraction Images Derived from Year-Based Project for On-Board Autonomy-Vegetation (PROBA-V) Data for the Rapid Assessment of Land Use and Land Cover Areas in Mato Grosso State, Brazil“. Land 9, Nr. 5 (02.05.2020): 139. http://dx.doi.org/10.3390/land9050139.
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This paper presents a new approach for rapidly assessing the extent of land use and land cover (LULC) areas in Mato Grosso state, Brazil. The novel idea is the use of an annual time series of fraction images derived from the linear spectral mixing model (LSMM) instead of original bands. The LSMM was applied to the Project for On-Board Autonomy-Vegetation (PROBA-V) 100-m data composites from 2015 (~73 scenes/year, cloud-free images, in theory), generating vegetation, soil, and shade fraction images. These fraction images highlight the LULC components inside the pixels. The other new idea is to reduce these time series to only six single bands representing the maximum and standard deviation values of these fraction images in an annual composite, reducing the volume of data to classify the main LULC classes. The whole image classification process was conducted in the Google Earth Engine platform using the pixel-based random forest algorithm. A set of 622 samples of each LULC class was collected by visual inspection of PROBA-V and Landsat-8 Operational Land Imager (OLI) images and divided into training and validation datasets. The performance of the method was evaluated by the overall accuracy and confusion matrix. The overall accuracy was 92.4%, with the lowest misclassification found for cropland and forestland (<9% error). The same validation data set showed 88% agreement with the LULC map made available by the Landsat-based MapBiomas project. This proposed method has the potential to be used operationally to accurately map the main LULC areas and to rapidly use the PROBA-V dataset at regional or national levels.
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Zhou, Qiang, Heather Tollerud, Christopher Barber, Kelcy Smith und Daniel Zelenak. „Training Data Selection for Annual Land Cover Classification for the Land Change Monitoring, Assessment, and Projection (LCMAP) Initiative“. Remote Sensing 12, Nr. 4 (20.02.2020): 699. http://dx.doi.org/10.3390/rs12040699.
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The U.S. Geological Survey’s Land Change Monitoring, Assessment, and Projection (LCMAP) initiative involves detecting changes in land cover, use, and condition with the goal of producing land change information to improve the understanding of the Earth system and provide insights on the impacts of land surface change on society. The change detection method ingests all available high-quality data from the Landsat archive in a time series approach to identify the timing and location of land surface change. Annual thematic land cover maps are then produced by classifying time series models. In this paper, we describe the optimization of the classification method used to derive the thematic land cover product. We investigated the influences of auxiliary data, sample size, and training from different sources such as the U.S. Geological Survey’s Land Cover Trends project and National Land Cover Database (NLCD 2001 and NLCD 2011). The results were evaluated and validated based on independent data from the training dataset. We found that refining the auxiliary data effectively reduced artifacts in the thematic land cover map that are related to data availability. We improved the classification accuracy and stability considerably by using a total of 20 million training pixels with a minimum of 600,000 and a maximum of 8 million training pixels per class within geographic windows consisting of nine Analysis Ready Data tiles (450 by 450 km2). Comparisons revealed that the NLCD 2001 training data delivered the best classification accuracy. Compared to the original LCMAP classification strategy used for early evaluation (e.g., Trends training data, 20,000 samples), the optimized classification strategy improved the annual land cover map accuracy by an average of 10%.
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Ainsworth, Peter. „Between real and virtual, map and terrain: ScanLab Projects, Post-lenticular Landscapes“. Philosophy of Photography 10, Nr. 2 (01.10.2019): 269–81. http://dx.doi.org/10.1386/pop_00020_1.
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London-based company ScanLab Projects is a multi-disciplinary commercial collaboration between architect, artist, coders and designers who utilize technologies surrounding 3D laser scanning in their practice. Inherent in the manner their projects are pitched is through reference to the photographic as technological process. Central to their engagement with the light detection and ranging (LiDAR) scanning apparatus is a consideration of the relationality between virtual or digital object and what could be determined as extrinsic or ‘real’ terrain. In Post-lenticular Landscapes, 2017, ScanLab created a series of LiDAR scans of Yosemite National Park. The landscape, presented as a stereoscopic film work where the spectator flies through an ephemeral black and white point cloud, is contextualized relationally to a certain photo-historical context and lineage: As Yosemite is synonymous with the advent of photographic process through the work of Muybridge, Watkins, Woods and Adams, the work revisits an archetypal image of the American sublime. In this text, I unpack ScanLab’s usage and conceptualization of LiDAR scans referentially to an understanding of the photographic. By considering how ScanLab frames our understanding of the project through the technological apparatus, the text attempts to problematize the scans by reading them through a particular art historic heritage. In this context, I posit alternate ways of reading the work, specifically through reference to the image of Yosemite that has proliferated across the desktops of Apple computers since 2014. Furthermore, through a reading of metonymy in the writing of Eelco Runia, the eerie as understood by Mark Fisher and in relation to Lev Manovich’s description of photorealism, I propose that the future of the mediation and understandings of machinic vision are to be thought with a reconsidered notion of the photographic.
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Huang, Bo-Chen, Jiun Hsu, Edward T. H. Chu und Hui-Mei Wu. „ARBIN: Augmented Reality Based Indoor Navigation System“. Sensors 20, Nr. 20 (17.10.2020): 5890. http://dx.doi.org/10.3390/s20205890.
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Due to the popularity of indoor positioning technology, indoor navigation applications have been deployed in large buildings, such as hospitals, airports, and train stations, to guide visitors to their destinations. A commonly-used user interface, shown on smartphones, is a 2D floor map with a route to the destination. The navigation instructions, such as turn left, turn right, and go straight, pop up on the screen when users come to an intersection. However, owing to the restrictions of a 2D navigation map, users may face mental pressure and get confused while they are making a connection between the real environment and the 2D navigation map before moving forward. For this reason, we developed ARBIN, an augmented reality-based navigation system, which posts navigation instructions on the screen of real-world environments for ease of use. Thus, there is no need for users to make a connection between the navigation instructions and the real-world environment. In order to evaluate the applicability of ARBIN, a series of experiments were conducted in the outpatient area of the National Taiwan University Hospital YunLin Branch, which is nearly 1800 m2, with 35 destinations and points of interests, such as a cardiovascular clinic, x-ray examination room, pharmacy, and so on. Four different types of smartphone were adopted for evaluation. Our results show that ARBIN can achieve 3 to 5 m accuracy, and provide users with correct instructions on their way to the destinations. ARBIN proved to be a practical solution for indoor navigation, especially for large buildings.
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Humphreys, B. L., A. T. McCray und D. A. B. Lindberg. „The Unified Medical Language System“. Methods of Information in Medicine 32, Nr. 04 (1993): 281–91. http://dx.doi.org/10.1055/s-0038-1634945.
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AbstractIn 1986, the National Library of Medicine began a long-term research and development project to build the Unified Medical Language System® (UMLS®). The purpose of the UMLS is to improve the ability of computer programs to “understand” the biomedical meaning in user inquiries and to use this understanding to retrieve and integrate relevant machine-readable information for users. Underlying the UMLS effort is the assumption that timely access to accurate and up-to-date information will improve decision making and ultimately the quality of patient care and research. The development of the UMLS is a distributed national experiment with a strong element of international collaboration. The general strategy is to develop UMLS components through a series of successive approximations of the capabilities ultimately desired. Three experimental Knowledge Sources, the Metathesaurus®, the Semantic Network, and the Information Sources Map have been developed and are distributed annually to interested researchers, many of whom have tested and evaluated them in a range of applications. The UMLS project and current developments in high-speed, high-capacity international networks are converging in ways that have great potential for enhancing access to biomedical information.
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Humphreys, B. L., A. T. McCray und D. A. B. Lindberg. „The Unified Medical Language System“. Yearbook of Medical Informatics 02, Nr. 01 (August 1993): 41–51. http://dx.doi.org/10.1055/s-0038-1637976.
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AbstractIn 1986, the National Library of Medicine began a long-term research and development project to build the Unified Medical Language System® (UMLS®). The purpose of the UMLS is to improve the ability of computer programs to “understand” the biomedical meaning in user inquiries and to use this understanding to retrieve and integrate relevant machine-readable information for users. Underlying the UMLS effort is the assumption that timely access to accurate and up-to-date information will improve decision making and ultimately the quality of patient care and research. The development of the UMLS is a distributed national experiment with a strong element of international collaboration. The general strategy is to develop UMLS components through a series of successive approximations of the capabilities ultimately desired. Three experimental Knowledge Sources, the Metathesaurus®, the Semantic Network, and the Information Sources Map have been developed and are distributed annually to interested researchers, many of whom have tested and evaluated them in a range of applications. The UMLS project and current developments in high-speed, high-capacity international networks are converging in ways that have great potential for enhancing access to biomedical information.