Journal articles: 'Aerial surveying'

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Thorson, Thomas A. "Aerial surveying of Wyoming bentonite." Applied Clay Science 11, no. 5-6 (May 1997): 329–35. http://dx.doi.org/10.1016/s0169-1317(96)00031-2.

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Ma, De Ying, and Hong Bin Lai. "Designing and Development of the Aerial Surveying Digital Data Management Information System Based on Two-Tier C/S Structure Model." Advanced Materials Research 610-613 (December 2012): 3702–7. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.3702.

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It’s necessary for surveying and mapping departments to manage aerial surveying digital data. How to manage increasing data automatically has become an urgent problem to be settled.The framework designing of the aerial digital data management information system is deeply dissertated and discussed in this paper. Then the system based on two-tier C/S structured model, using the Borland's Delphi development tool, Microsoft’s SQL Server 2000 ultra-large databases and SuperMap Objects graphical components is established, using parts of present data collecting from the aerial photographic surveying department.Compared with traditional systems, this aerial digital data management system has a good nature.It realize the automation management and operation easily.

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Dickson, Bruce L. "Recent advances in aerial gamma-ray surveying." Journal of Environmental Radioactivity 76, no. 1-2 (January 2004): 225–36. http://dx.doi.org/10.1016/j.jenvrad.2004.03.028.

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Hlotov, Volodymyr, Alla Hunina, and Zbigniew Siejka. "Accuracy Investigation of Creating Orthophotomaps Based on Images Obtained by Applying Trimble-UX5 UAV." Reports on Geodesy and Geoinformatics 103, no. 1 (June 27, 2017): 106–18. http://dx.doi.org/10.1515/rgg-2017-0009.

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Abstract The main purpose of this work is to confirm the possibility of making largescale orthophotomaps applying unmanned aerial vehicle (UAV) Trimble- UX5. A planned altitude reference of the studying territory was carried out before to the aerial surveying. The studying territory has been marked with distinctive checkpoints in the form of triangles (0.5 × 0.5 × 0.2 m). The checkpoints used to precise the accuracy of orthophotomap have been marked with similar triangles. To determine marked reference point coordinates and check-points method of GNSS in real-time kinematics (RTK) measuring has been applied. Projecting of aerial surveying has been done with the help of installed Trimble Access Aerial Imaging, having been used to run out the UX5. Aerial survey out of the Trimble UX5 UAV has been done with the help of the digital camera SONY NEX-5R from 200m and 300 m altitude. These aerial surveying data have been calculated applying special photogrammetric software Pix 4D. The orthophotomap of the surveying objects has been made with its help. To determine the precise accuracy of the got results of aerial surveying the checkpoint coordinates according to the orthophotomap have been set. The average square error has been calculated according to the set coordinates applying GNSS measurements. A-priori accuracy estimation of spatial coordinates of the studying territory using the aerial surveying data have been calculated: mx=0.11 m, my=0.15 m, mz=0.23 m in the village of Remeniv and mx=0.26 m, my=0.38 m, mz=0.43 m in the town of Vynnyky. The accuracy of determining checkpoint coordinates has been investigated using images obtained out of UAV and the average square error of the reference points. Based on comparative analysis of the got results of the accuracy estimation of the made orthophotomap it can be concluded that the value the average square error does not exceed a-priori accuracy estimation. The possibility of applying Trimble UX5 UAV for making large-scale orthophotomaps has been investigated. The aerial surveying output data using UAV can be applied for monitoring potentially dangerous for people objects, the state border controlling, checking out the plots of settlements. Thus, it is important to control the accuracy the got results. Having based on the done analysis and experimental researches it can be concluded that applying UAV gives the possibility to find data more efficiently in comparison with the land surveying methods. As the result, the Trimble UX5 UAV gives the possibility to survey built-up territories with the required accuracy for making orthophotomaps with the following scales 1: 2000, 1: 1000, 1: 500.

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Hlotov, Volodymyr, Alla Hunina, Ihor Kolb, Vadim Kolesnichenko, and Ihor Trevoho. "THE STUDY OF THE “CETUS” UNMANNED AERIAL VEHICLE FOR TOPOGRAPHIC AERIAL SURVEYING." Geodesy and cartography 47, no. 2 (August 16, 2021): 96–103. http://dx.doi.org/10.3846/gac.2021.12120.

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The work aims to analyze and study the possibilities of using “Cetus” unmanned aerial vehicle (UAV) for performing topographic aerial surveys. The authors developed and tested aircraft-type UAV for topographic aerial photography. The studies were conducted on a specialized landfill, at which there is an appropriate number of situational points whose coordinates are determined with high accuracy. These points were used as both reference and control points. The obtained UAV aerial survey materials were subjected to a phototriangulation process to determine the orientation elements and to analyze, first and foremost, the angular orientation elements. The surveying was carried out on a mountainous territory, where the spatial coordinates of 37 situational points were determined by the method of ground-based GPS survey with an average accuracy of up to 0.05 m. These points were used as reference and control points. Aerial photography was performed in such a way that the scale of the images was as uniform as possible. The design solutions implemented in the Cetus UAV provide all the possibilities to perform aerial surveys of territories in strict compliance with the projected flight parameters. UAV equipment provides the necessary real-time correction of the position of the aerial camera. At the same time the optimum straightness of routes, stability of scales and mutual overlapping of pictures is reached. Regarding the accuracy of obtaining the spatial coordinates of the points of terrain objects, using “Cetus” UAV surveys, plans can even be made on a scale of even 1: 1000. As a result of the creation of the UAV “Cetus”, it became possible to perform the topographic aerial survey of the territories and to create large-scale orthophotos that fully meet the instructions. As a result of testing the “Cetus” UAV, it can be used in production processes when drawing up topographic plans for a large-scale series: 1: 1000 – 1: 5000, which will significantly save the cost of performing topographic work.

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Pérez, M., F. Agüera, and F. Carvajal. "LOW COST SURVEYING USING AN UNMANNED AERIAL VEHICLE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-1/W2 (August 16, 2013): 311–15. http://dx.doi.org/10.5194/isprsarchives-xl-1-w2-311-2013.

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Yeh, Fu-Hsuan, Chun-Jia Huang, Jen-Yu Han, and Louis Ge. "Modeling Slope Topography Using Unmanned Aerial Vehicle Image Technique." MATEC Web of Conferences 147 (2018): 07002. http://dx.doi.org/10.1051/matecconf/201814707002.

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Nowadays, a wide range of site planning, field investigation and slope analysis need to be carried out for slope protection and landslide-related disaster reduction. To enhance the efficiency of topography modeling, unmanned aerial vehicle (UAV) has become a new surveying technique to obtain spatial information. This study aims to determine the topography of a slope by using a digital camera mounted on UAV to photograph with a high degree of overlap. The 3D point clouds data were generated through image feature point extraction integrated with accurate GPS ground control points. It is found in this study that the obtained Digital Surface Model (DSM) data, compared with the traditional field surveying techniques, has much superior performance. The resolution of the DSM has reached 1.58 cm. Also, the error of elevation and distance between DSM and actual 3D coordinates obtained by traditional total station survey is acceptance. It is clear that such a UAV surveying technique can replace conventional surveying methods and provide complete and accurate 3D topography information in automatic and highly efficient manner for most geotechnical applications.

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Kadnichanskiy, S. A., M. V. Kurkov, V. M. Kurkov, and Aleksandr Chibunichev. "Certification testing hardware-and-software complex based on unmanned aerial vehicle “Geoscan 401”." Geodesy and Cartography 957, no. 3 (April 20, 2020): 32–38. http://dx.doi.org/10.22389/0016-7126-2020-957-3-32-38.

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The authors present the results of certification testing software-and-hardware complex on the basis of an unmanned aircraft (UAV) “Geoskan 401”, designed for aerial mapping. The substantiation of the need to assess the accuracy characteristics of the photogrammetric processing aerial photos results from the UAV is given. The composition of the complex, the parameters of the test site and the performed aerial photography are given, the order and method of testing are described. Assessment of the aerial triangulation accuracy, creation of a digital elevation model, digital orthophotos and coordinates of marked and unmarked characteristic points (natural contours) of land boundaries and building contours were carried out to confirm the compliance with the requirements of regulatory documents for the implementation of photogrammetric processing, maintenance of the state real estate cadastre and surveying. The values of the spatial data accuracy obtained with the help of a hardware-and-software complex confirm the possibility of using the “Geoskan 401” in real estate cadastre and surveying. Recommendations on the use of hardware and software complex for cadastral and mine surveying works are given.

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Li, Qing. "Application of Unmanned Aerial Vehicle Remote Sensing in Engineering Measurement." Remote Sensing 9, no. 2 (October 23, 2020): 42. http://dx.doi.org/10.18282/rs.v9i2.1372.

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Unmanned aerial vehicle remote sensing is widely used in the whole engineering measurement in recent years. It has many advantages including simple operation, high accuracy and high efficiency. It is precisely because of these advantages that unmanned aerial vehicle remote sensing has gradually replaced the traditional surveying and mapping technology to be widely used. With the continuous expansion of the number and scale of projects in China, the effect of unmanned aerial vehicle remote sensing in engineering measurement is getting bigger and bigger. This article mainly analyzes the advantages of unmanned aerial vehicle remote sensing and its application in engineering measurement, so as to provide some reference for the development of surveying and mapping engineering in China.

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Julge, Kalev, Artu Ellmann, and Romet Köök. "Unmanned Aerial Vehicle Surveying For Monitoring Road Construction Earthworks." Baltic Journal of Road and Bridge Engineering 14, no. 1 (March 28, 2019): 1–17. http://dx.doi.org/10.7250/bjrbe.2019-14.430.

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Unmanned aerial vehicle photogrammetry is a surveying technique that enables generating point clouds, 3D surface models and orthophoto mosaics. These are based on photos captured with a camera placed on an unmanned aerial vehicle. Within the framework of this research, unmanned aerial vehicle photogrammetry surveys were carried out over a sand and gravel embankment with the aim of assessing the vertical accuracy of the derived surface models. Flight altitudes, ground control points and cameras were varied, and the impact of various factors on the results was monitored. In addition, the traditional real-time-kinematic Global Navigation Satellite System surveys were conducted for verifications. Surface models acquired by different methods were used to calculate volumes and compare the results with requirements set by Estonian Road Administration. It was found that with proper measuring techniques an accuracy of 5.7 cm for the heights were achieved.

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Hay, A., C. Samson, L. Tuck, and A. Ellery. "Magnetic surveying with an unmanned ground vehicle." Journal of Unmanned Vehicle Systems 6, no. 4 (December 1, 2018): 249–66. http://dx.doi.org/10.1139/juvs-2018-0013.

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With the recent proliferation of unmanned aerial vehicles for geophysical surveying, a novel opportunity exists to develop unmanned ground vehicles in parallel. This contribution features a study to integrate the Husky A200 robotic development platform with a GSMP 35U magnetometer that has recently been developed for the unmanned aerial vehicle market. Methods to identify and reduce the impact of magnetically noisy components on the unmanned ground vehicle platforms are discussed. The noise generated by the platform in laboratory and gentle field conditions, estimated using the fourth difference method for a magnetometer–vehicle separation distance of 121 cm and rotation of the chassis wheels at full speed (1 m/s), is ±1.97 nT. The integrated unmanned ground vehicle was used to conduct two robotic magnetic surveys to map cultural targets and natural variations of the magnetic field. In realistic field conditions, at a full speed of 1 m/s, the unmanned ground vehicle measured total magnetic intensity over a range of 1730 nT at 0.1 m spatial resolution with a productivity of 2651 line metres per hour.

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Kurkov, V. M., T. N. Skripitsina, and A. Yu Sozonova. "METHODS AND TECHNOLOGIES FOR AERIAL SURVEYING AND GROUND PHOTOGRAMMETRIC SURVEYS FOR ARCHAEOLOGICAL PURPOSES." ECOLOGY ECONOMY INFORMATICS. GEOINFORMATION TECHNOLOGIES AND SPACE MONITORING 2, no. 5 (2020): 75–82. http://dx.doi.org/10.23885/2500-123x-2020-2-5-75-82.

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This article we consider methods and technologies of unmanned aerial surveying and close-range photogrammetric survey as applied for archeological research. We summed up the practical experience of the specialists of the Moscow State University of Geodesy and Cartography (MIIGAiK), obtained with the participation in the Bosporus archaeological expedition of the State Historical Museum on the Taman Peninsula in 2018–20. During the 3 expeditions, 18 archaeological sites were surveyed by aerial methods using UAV Geoscan 101 Geodesy and UAS DJI Phantom 4 Pro. In addition to aerial surveying, the Canon 30D digital camera with 50 mm and 14 mm focal lengths was used for groundbased, close-range photogrammetric surveys of archaeological sites. Some sites were surveyed many times during different periods of archaeological research. At all surveyed archaeological sites using photogrammetric processing methods at the Agisoft Metashape software we received survey documents (orthophoto, digital terrain models, 3D models). For some artifacts, three-dimensional metric models have been obtained using digital photogrammetry methods. Various methods of aerial surveying were used to study archaeological sites. The article gives recommendations on optimization of photography process in order to obtain reliable and informative documents for archaeological excavations. Comparison and analysis of aerial and close-range survey data was performed by the QGIS geographic information system. The information obtained using geo-information technologies will improve the quality and reliability of forecasts and hypotheses in archaeological studies.

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Mészáros, J. "AERIAL SURVEYING UAV BASED ON OPEN-SOURCE HARDWARE AND SOFTWARE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XXXVIII-1/C22 (September 6, 2012): 155–59. http://dx.doi.org/10.5194/isprsarchives-xxxviii-1-c22-155-2011.

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Hodgson, Amanda, David Peel, and Natalie Kelly. "Unmanned aerial vehicles for surveying marine fauna: assessing detection probability." Ecological Applications 27, no. 4 (April 17, 2017): 1253–67. http://dx.doi.org/10.1002/eap.1519.

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Ramos, Fabio, Bruce Dickson, and Suresh Kumar. "Denoising aerial gamma-ray surveying through non-linear dimensionality reduction." Journal of Field Robotics 24, no. 10 (2007): 849–61. http://dx.doi.org/10.1002/rob.20220.

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Fletcher, Reginald S., Allan T. Showler, and Paul A. Funk. "Surveying Thermally-defoliated Cotton Plots with Color-infrared Aerial Photography." Crop Management 6, no. 1 (2007): 1–6. http://dx.doi.org/10.1094/cm-2007-0625-01-rs.

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Puniach, Edyta, and Anita Kwartnik-Pruc. "The Use of Laser Scanning and Unmanned Aerial Vehicles in Construction Surveying in the Light of Legal Regulations in Poland." Journal of Applied Engineering Sciences 8, no. 2 (December 1, 2018): 79–88. http://dx.doi.org/10.2478/jaes-2018-0022.

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Abstract Construction surveying consist in overall surveying works performed at every stage of the construction and use of a building structure. The surveyor participates in the processes of designing, direct implementation, maintenance and use, as well as demolition of a building structure. Advanced surveying techniques, such as laser scanning and UAV photogrammetry, are being increasingly used to perform the surveyor’s tasks. The aim of this research paper was to analyze the Polish legal regulations for the possibilities of applying the above-mentioned techniques to carry out the surveying works which are subject to the obligatory submission to public administration authorities. The primary focus was placed on the type of the works associated with construction surveying. The conducted research studies confirmed the lack of appropriate guidelines that would clearly define the scope and method of using laser scanning and UAV photogrammetry in construction surveying. At the same time, it was demonstrated that both these techniques of spatial data acquisition were sufficiently accurate to perform plane and vertical land surveys pursuant to the legal acts currently in force in Poland, and they can be used at selected stages of construction surveying. Finally, the authors proposed some solutions that would make it easier for the surveyors to use laser scanning and UAV photogrammetry in standard surveying works.

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Pacina, Jan. "Geodetic surveying as part of archaeological research in Sudan." Geoinformatics FCE CTU 14, no. 1 (June 27, 2015): 47–64. http://dx.doi.org/10.14311/gi.14.1.4.

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Surveying is an important part of any archaeological research. In this paper we focus on the archaeological research in north Sudan (6th Nile cataract) and the surveying methods applicable under the local conditions. Surveying in the Third World countries is affected by the political situation (limited import of surveying tools), local conditions (lack of fixed points, GNSS correction signal), inaccessible basemaps and fixed point network. This article describes the methods and results obtained during the three archaeological seasons (2011-2014). The classical surveying methods were combined with KAP (Kite Aerial Photography) to obtain the desired results in form of archaeological maps, detailed orthophoto images and other analyses results.

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Bryn, Mikhail Y., and Dinara R. Bashirova. "COMPARATIVE EVALUATION EFFICIENCY OF MOBILE LASER SCANNING AND AERIAL SURVEYING FROM UNMANNED AERIAL VEHICLES FOR ROAD SURVEY." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 26, no. 3 (2021): 20–27. http://dx.doi.org/10.33764/2411-1759-2021-26-3-20-27.

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The application of mobile laser scanning and aerial photography from unmanned aerial vehicles for shooting highways is considered. The aim of the research was to compare the results of shooting using mobile laser scanning systems and aerial photography from an unmanned aerial vehicle to de-termine the preferred option for shooting a highway. The experimental part of the research was carried out using the following equipment: scanning was performed using the Topcon IP - S2 Compact sys-tem, aerial photography was carried out from the GEOSCAN 201 unmanned aerial vehicle. Based on the comparative tests performed on the section of the A - 121 "Sortavala" highway, a comparative analysis of the data obtained for various indicators was carried out: the speed of the shooting stages, the cost of a set of equipment, the cost of shooting, and the accuracy of the results was evaluated. Practical recommendations for the application of these methods are given, their advantages and disad-vantages are indicated.

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Ajvazi, Besim, Fisnik Loshi, and Béla Márkus. "From Surveying to Geomatics." Landscape & Environment 10, no. 3-4 (September 10, 2016): 153–60. http://dx.doi.org/10.21120/le/10/3-4/8.

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In the land surveying profession fast changes have been taking place in the last fifty years. Technological changes are generated by the Information and Communication Technologies; the analogue – digital trends; the automatic data acquisition methods replace manual ones; instead of two-dimensional base maps we use dynamic spatial databases more and more integrated into a global data infrastructure. However, these changes cause impacts also on scientific level. The traditional top-down approach substituted by bottom-up methodologies; in many cases the point-by-point measurement is changed by 3D laserscanning or Unmanned Aerial Systems, which produces huge amount of data, but it needs new algorithms for information extraction; instead of a simple data provision land surveyors support complex spatial decisions. The paper is dealing with some aspects of these changes. In the first chapter the authors would like to highlight the “data-information-knowledge” relations and the importance of changes in professional education. The second chapter gives an example of the benefits of a Global Spatial Data Infrastructure in spatial decision support. Finally we introduce a new concept (Building Information Modelling) in modelling the real world. However, until now BIM is used in building construction industry, it can can be a paradigm shift in geospatial information management in general.

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Kuznetsov, Evgeniy, Galina Koretskaia, and Asmelash Abay. "Comparative Analysis of Aerial Photography with Instrumental Survey." E3S Web of Conferences 174 (2020): 01031. http://dx.doi.org/10.1051/e3sconf/202017401031.

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At present, in Kuzbass, various methods of automation of plane surveys in open mining are used. In most cases, the choice of method depends on the material base of the enterprise and the professionalism of the performers. Typically, the work on the surveying automation consists in using electronic tachometers, which reduce time and simplify field and office work. However, the use of electronic tachometers remains the human factor and does not allow solving the problem of displaying the situation throughout the open pit at one physical moment of time. Aerial photography (AP) significantly increases the performance of plane surveys and makes it possible to most fully and reliably display the information about the surface and ensure the safety of fieldwork. The article presents a comparative analysis of the accuracy of constructing a digital terrain model obtained during aerial photography by AN-2 aircraft and instrumental survey performed with electronic tachometer Leica TS 06 plus, by example of surveying a trench of section № 1 at Olzherassky open pit in the Kemerovo region. The advantages and disadvantages of AP from an airplane and prospects of using AP from an unmanned aerial vehicle (UAV) are given.

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Du, Wenjia, Fengchen Chen, Ke Tang, Lan Cheng, and Huanjing Jiao. "Research on rapid mapping technology in the field of unmanned aerial vehicle (UAV) aerial survey." E3S Web of Conferences 131 (2019): 01065. http://dx.doi.org/10.1051/e3sconf/201913101065.

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Through the development of computer image processing technology and UAV technology, after installing high-definition cameras on UAVs and taking high-resolution images, the technology of directly generating DOM images in the surveyed areas using software has been well-developed. However, under the emergency conditions such as dealing with disasters, the long-term processing time required for aerial surveys of UAVs has become a major efficiency constraint to surveying and mapping. This paper focuses on the rapid mapping and mosaicking of survey images from unmanned aerial vehicles under emergency conditions, and elaborates current research status, difficulties and resolvents of the rapid mapping of existing UAVs.

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Jianming, Chen. "Map of the Mount Gongga Glacier: A Combination of Terrestrial and Aerial Photogrammetry." Annals of Glaciology 8 (1986): 34–36. http://dx.doi.org/10.1017/s0260305500001099.

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For use in glaciological research, between 1982 and 1984, we succeeded in surveying and mapping the Mount Gongga Glacier, on a scale of 1:25 000, by means of a combination of terrestrial and aerial photogrammetry. This paper describes the method in detail. In the survey area, we set up an independent, triangulation network, with microwave distance measurement, and two, independent, straight-line traverses, for basic control. Control points were observed by intersection. The terrestrial, photogrammetric baselines were projected and corrected into distances on the. plane of the map. Terrestrial photography accounted for the majority of the photographs of the survey area. Surveying and mapping of planimetrie and topographic features were completed on a stereo-autograph, using plates mainly from terrestrial photogrammetry. Where these data were insufficient, they were supplemented by aerial photography, plotted on a photographic plotting instrument. Orientation points of the aerial photographs were established by terrestrial, photogrammetric analysis and located on the map by an optical, mechanical method. The practical result showed that a combination of terrestrial and aerial photogrammetry, in mapping a high, mountain, glacier area, on a large scale, is more feasible and flexible than other methods and more economical as well.

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Jianming, Chen. "Map of the Mount Gongga Glacier: A Combination of Terrestrial and Aerial Photogrammetry." Annals of Glaciology 8 (1986): 34–36. http://dx.doi.org/10.3189/s0260305500001099.

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For use in glaciological research, between 1982 and 1984, we succeeded in surveying and mapping the Mount Gongga Glacier, on a scale of 1:25 000, by means of a combination of terrestrial and aerial photogrammetry. This paper describes the method in detail.In the survey area, we set up an independent, triangulation network, with microwave distance measurement, and two, independent, straight-line traverses, for basic control. Control points were observed by intersection. The terrestrial, photogrammetric baselines were projected and corrected into distances on the. plane of the map.Terrestrial photography accounted for the majority of the photographs of the survey area. Surveying and mapping of planimetrie and topographic features were completed on a stereo-autograph, using plates mainly from terrestrial photogrammetry. Where these data were insufficient, they were supplemented by aerial photography, plotted on a photographic plotting instrument. Orientation points of the aerial photographs were established by terrestrial, photogrammetric analysis and located on the map by an optical, mechanical method.The practical result showed that a combination of terrestrial and aerial photogrammetry, in mapping a high, mountain, glacier area, on a large scale, is more feasible and flexible than other methods and more economical as well.

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Wang, Gang, Guang Li Guo, Jian Feng Zha, and Bing Fang Liu. "The Development Process and Prospects of Mine Surveying in China." Applied Mechanics and Materials 71-78 (July 2011): 1311–17. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.1311.

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Mine surveying is an important part and infrastructure protection of mine production and mine construction, and it is also very important basic work of coal mine safety production. This article summarized the development process of China's mine surveying for 60 years, the development process of China's mine surveying was from Transit Times which angling and distancing separately to Electronic Total Time which angling and distancing combo. Today, China's mine surveying has developed into an information science which combines with measurement and optoelectronic technology, computer technology, global positioning system (GPS), geographical information system (GIS) , remote sensing (RS) , D-InSAR and Unmanned Aerial Vehicle Remote Sensing with the rapid development of science and technology. This paper also analyzed the development status, opportunities and challenges-digital of China's mine surveying , and pointed out its development direction and what measures should be taken.

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Park, Jung Il, Mun Seok Lee, and Seung Young Choi. "A Study on the Unmanned Aerial Photogrammetry Quality for Cadastral Surveying." Journal of the Korean Cadastre Information Association 21, no. 3 (December 31, 2019): 50–62. http://dx.doi.org/10.46416/jkcia.2019.12.21.3.50.

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Borowicz, Alex, Hieu Le, Grant Humphries, Georg Nehls, Caroline Höschle, Vladislav Kosarev, and Heather J. Lynch. "Aerial-trained deep learning networks for surveying cetaceans from satellite imagery." PLOS ONE 14, no. 10 (October 1, 2019): e0212532. http://dx.doi.org/10.1371/journal.pone.0212532.

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Cronin, Marionne. "Northern Visions: Aerial Surveying and the Canadian Mining Industry, 1919-1928." Technology and Culture 48, no. 2 (2007): 303–30. http://dx.doi.org/10.1353/tech.2007.0063.

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Mozas-Calvache, A. T., J. L. Pérez-García, F. J. Cardenal-Escarcena, E. Mata-Castro, and J. Delgado-García. "Method for photogrammetric surveying of archaeological sites with light aerial platforms." Journal of Archaeological Science 39, no. 2 (February 2012): 521–30. http://dx.doi.org/10.1016/j.jas.2011.10.007.

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Cai, Z., W. Liu, G. Luo, and Z. Xiang. "STUDY ON PRACTICAL TECHNOLOGIES OF AERIAL TRIANGULATION FOR REAL SCENE 3D MOELING WITH OBLIQUE PHOTOGRAPHY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3 (April 30, 2018): 119–21. http://dx.doi.org/10.5194/isprs-archives-xlii-3-119-2018.

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The key technologies in the real scene 3D modeling of oblique photography mainly include the data acquisition of oblique photography, layout and surveying of photo control points, oblique camera calibration, aerial triangulation, dense matching of multi-angle image, building of triangulation irregular network (TIN) and TIN simplification and automatic texture mapping, among which aerial triangulation is the core and the results of aerial triangulation directly affect the later model effect and the corresponding data accuracy. Starting from this point of view, this paper aims to study the practical technologies of aerial triangulation for real scene 3D modeling with oblique photography and finally proposes a technical method of aerial triangulation with oblique photography which can be put into practice.

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Mantey, S. "Suitability of Unmanned Aerial Vehicles for Cadastral Surveys." Ghana Mining Journal 19, no. 1 (June 30, 2019): 1–8. http://dx.doi.org/10.4314/gm.v19i1.1.

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Cadastral surveys in Ghana often employ well known surveying equipment such as Total Station andGNSSreceivers or a combination of both. These survey techniques are well-established and widely accepted. However, there are limitations in certain areas. In situations where difficult terrain and inaccessible areas and dense vegetation are encountered or when surveyor’s life may be at risk, Unmanned Aerial Vehicles (UAVs) could be used to overcome the limitations of these well-established survey instruments. This research used high resolution images from UAV (DJI Phantom 4) to survey plots within the University of Mines and Technology land area. Coordinates of the boundary points were extracted using Agisoft Photoscan.GNSSreceivers were also used to survey the land and the same boundary point coordinates obtained and compared. This enabled the establishment of accurate ground control points for georeferencing. The coordinates obtained from both UAV andGNSSSurveys were used to prepare cadastral plans and compared. The difference in Northings and Eastings from UAV andGNSSsurveys were +0.380 cmand +0.351 cmrespectively. These differences are well within tolerance of +/-0.9114 m(+/-3 ft) set by the Survey and Mapping Division (SMD) of the Lands Commission for cadastral plans production. This research therefore concludes that high resolution images from UAVs are suitable for cadastral surveying. Keywords: Unmanned Aerial Vehicles, Drones, Global Navigation Satellite Systems, Cadastral Surveys

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Bakó, Gábor, Zsolt Molnár, Zsófia Szilágyi, Csaba Biró, Edina Morvai, Örs Ábrám, and András Molnár. "Accurate Non-Disturbance Population Survey Method of Nesting Colonies in the Reedbed with Georeferenced Aerial Imagery." Sensors 20, no. 9 (May 2, 2020): 2601. http://dx.doi.org/10.3390/s20092601.

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High altitude aerial surveys have the potential to improve disturbance-free data collection in wildlife research, but previously, bird species were not recognizable in high-altitude orthophotos. This method of aerial surveying is effective and can be repeated frequently due to its low cost; it also has the additional advantage of being able to monitor the status of protected areas. In the case of waterbirds, due to the low vegetation coverage, aerial remote sensing is an exceptionally effective technique for surveying populations and detecting nests. Aerial surveys made at low altitudes can cause serious stress for birds. The method we developed and employed is unlikely to be detected by either ground-based or nesting birds but is far more reliable compared to the low-resolution imaging methods and to the evaluation of non-georeferenced photo series. The modern sensors and photogrammetric procedures enable the use of the present method worldwide; furthermore, the large-scale ortho image-derived information has become obtainable more frequently. Direct georeferencing makes the field geodetic survey unnecessary. Orthophotos with a 0.7 cm spatial resolution allow us to reliably identify even the individuals of smaller species, and by the use of oblique images, they can be tracked from two or four different directions.

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Dragomir, Lucian Octavian, Roxana Claudia Herbei, and Mihai Valentin Herbei. "The use of modern technologies in the surveying field." MATEC Web of Conferences 342 (2021): 02016. http://dx.doi.org/10.1051/matecconf/202134202016.

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In order to achieve or complete the 1: 1.000 scale situation plan and the digital terrain model for the Timişoara - Sibiu highway section, and given the difficult access conditions in the project area, it was decided to use photogrammetric techniques for extraction of spatial information needed for mapping. In order to achieve the mapping requirements at a scale of 1: 1.000, the following activities were performed: Realization of the geodetic support network; Realization of the aerial photography project; Making pre-marking points in areas without clear details or other location possibilities; Simultaneous aerial photography of sub-blocks at different flight heights to ensure a 12 cm pixel and simultaneous laser scanning with LiDAR system; Identification of marking and pre-marking points on the subblock frames; Performing GPS measurements to determine the coordinates of landmarks and photogrammetric pre-marking; LIDAR data processing using permanent GPS stations to obtain coordinates in the ETRS89 system and transform them into the STEREO70 system and Black Sea reference plan 75; Calibration of LIDAR data; Filtering LIDAR data; Realization of aerotriangulation on subblocks or bands; Stereo restitution of planimetric and altimetric details for 1: 1.000 scale (3D mode); Transforming 3D plans into 2D plans; Editing and elaborating topographic plans.

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Wang, Z., H. Wu, J. Zhu, R. Zhang, H. Song, J. Wang, and Z. He. "CAPACITY BUILDING FOR GEO-INFORMATION DRIVEN EMERGENCY RESPONSE IN CHINA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W8 (August 23, 2019): 447–53. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w8-447-2019.

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Abstract. Surveying and mapping technologies played a significant role in former emergency response activities. Despite remarkable progress on emergency surveying and mapping has been achieved in China, there are still some limits to meet the quick and smart response requirements. Aiming to fill the gaps, Chinese government has proposed a capacity building project for geo-information driven emergency response. In this paper, the business process and data flow of emergency surveying and mapping are analysed firstly. Then, the major design of this project is introduced through 4 parts. These are capacity of UAV aerial photography, capacity of field surveying, capacity of smart service and capacity of data integration. Finally, the preliminary progress and prospective achievement are discussed. The implementation of this project could be an example for comprehensive application of advanced surveying and mapping technologies, and could also be a basis to improve our national emergency response framework.

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Elliott, Kyle H., Paul A. Smith, and Victoria H. Johnston. "Aerial Surveys Do Not Reliably Survey Boreal-nesting Shorebirds." Canadian Field-Naturalist 124, no. 2 (April 1, 2010): 145. http://dx.doi.org/10.22621/cfn.v124i2.1053.

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Aerial surveys have been used as a method for surveying boreal-nesting shorebirds, which breed in difficult-to-access terrain; however, the fraction of breeding birds observed from the air is unknown. We investigated rates of detection by conducting simultaneous air and ground surveys for shorebirds at three sites in the boreal forest of the Northwest Territories, Canada, in 2007. Helicopter surveys included both pond-based surveys where the helicopter flew around the perimeter of each wetland and transect-based surveys where observers recorded birds seen on line transects. Ground surveys involved intensive observation, territory mapping and nest searching in 5 km2 of plots over a period of 5-6 weeks. Shorebird densities observed from the helicopter were highest near large bodies of water. No shorebirds were observed over closed forest despite breeding densities on ground surveys being highest in closed forest. Detection rates were very low, varied among species and aerial survey types, and were inconsistent over time. Ground-based observations showed that the shorebirds often did not flush in response to the helicopter passing overhead. Owing to poor rates of detection, we conclude that helicopter surveys are not an appropriate method for surveying breeding shorebirds in boreal habitats, but may have some utility for monitoring birds' use of stop-over locations.

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Zihad, Mohamad Mahmud, Kamarul Arifin Ahmad, and A. Halim Kadarman. "Computer Aided Design, Analysis and Prototype Development of 2-Axis Stabilized Aerial Image Capturing." Applied Mechanics and Materials 225 (November 2012): 310–14. http://dx.doi.org/10.4028/www.scientific.net/amm.225.310.

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This paper presents an ongoing study and research of a 2-Axis stabilized aerial image capturing system to obtain aerial images. Aerial images are commonly used for reconnaissance, area surveying, and also for search and rescue mission. Currently, several methods of remote sensing were developed with multiple objectives either for civil or military applications to obtain high precision images. The study involves the design and fabrication of 2-Axis stabilized image system platform. Rolling and pitching motion of an air vehicle effects while airborne to acquire sharp vertical images are the main consideration in this study.

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Smekalova, Tatyana, Edgar Terekhin, Alexei Pasumanskiy, and Fedor Lisetskii. "Using of historical cartography, remote sensing data and GIS for studying of land division system of Taurian Chersonesos." InterCarto. InterGIS 26, no. 4 (2020): 177–87. http://dx.doi.org/10.35595/2414-9179-2020-4-26-177-187.

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The article presents the results of work on the use of historical cartography data, German captured aerial photographs of Luftwaffe 1941–1944, a satellite image of 1966 and geographic information systems (GIS) for a detailed reconstruction and identification of the basic principles of the ancient land division system of the ancient chora (rural area) of Tauric Chersonesos in Crimea. Based on the integrated GIS, it was possible to reconstruct an ancient grid of 4- and 6-hecatogygos blocks linked to the terrain, separated by roads. The creation of plans for intra-unit land surveying was carried out on the basis of the analysis of multi-temporal aerial and satellite imagery in the ArcGIS geographic information environment. It was carried out by creating and further processing a group of vector layers, the main of which included a grid of roads, the rest — dividing blocks into plots and single hector modules. The analysis in the GIS of the mutual arrangement of the elements of this grid made it possible to determine the sequence of development and delimitation of the territory of the Heraclean Peninsula in the 4th century BC. The study of the internal surveying of blocks by mosaic of aerial photographs of 1941–1944, integrated into the GIS, made it possible to trace the dynamics of changes in the 3rd century BC of internal division of blocs from individual civil plots (hectators) to large land holdings, sometimes reaching and even exceeding the size of the whole block. As a result of a comprehensive study using historical cartography, archival aerial photographs of the 1940s and a satellite image of 1966, collected in a single geographic information system, it was possible to determine the basic principles and identify the modules of the Taurian Chersonesos land surveying: a single civil plots (hecatogygos) and a unit of measurement of areas (aroura).

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Anikeeva, I., and A. Chibunichev. "REQUIREMENTS FOR AERIAL IMAGES QUALITY, OBTAINED FOR MAPPING PURPOSES." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B2-2021 (June 28, 2021): 777–84. http://dx.doi.org/10.5194/isprs-archives-xliii-b2-2021-777-2021.

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Abstract. The quality of cartographic products, obtained on base of aerial images, depends on their quality. The image‘s quality can be defined in terms of measurement characteristics and in it’s visual properties. The object of the paper is an aerial image’s quality, concerning its visual perception. The process of topographic aerial images quality assessing is currently not regulated, therefore, this problem becomes particularly relevant today. The article is devoted to development the quality criteria system for aerial images, obtained for mapping purposes, and definition the requirements for them. The analysis of factors affecting the quality of aerial images is carried out, they include natural conditions, technical and technological parameters of aerial surveying and images post-processing. The main imperfections of image quality, appearing as a result of these factors influence are determined – blurring, high level of random image noise, haze, color imbalance, loss of information in shadows and illumination. Methods of identifying these imperfections and assessing their influence on aerial images quality are shown.

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Lambey, V., and A. D. Prasad. "UNMANNED AERIAL VEHICLE APPLICATIONS OF 3D MODELLING, VISUALIZATION AND PARAMETER CALCULATIONS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-5 (November 19, 2018): 649–52. http://dx.doi.org/10.5194/isprs-archives-xlii-5-649-2018.

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Abstract. Photogrammetric surveying with the use of Unmanned Aerial Vehicles (UAV) have gained vast popularity in short span. UAV have the potential to provide imagery at an extraordinary spatial and temporal resolution when coupled with remote sensing. Currently, UAV platforms are fastest and easiest source of data for mapping and 3D modelling. It is to be considered as a low-cost substitute to the traditional airborne photogrammetry. In the present study, UAV applications are explored in terms of 3D modelling, visualization and parameter calculations. National Institute of Technology Raipur, Raipur is chosen as study area and high resolution images are acquired from the UAV with 85% overlap. 3D model is processed through the point cloud generated for the UAV images. The results are compared with traditional methods for validation. The average accuracy obtained for elevation points and area is 97.99% and 97.75%. The study proves that UAV based surveying is an economical alternative in terms of money, time and resources, when compared to the classical aerial photogrammetry methods.

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Carvajal, F., F. Agüera, and M. Pérez. "SURVEYING A LANDSLIDE IN A ROAD EMBANKMENT USING UNMANNED AERIAL VEHICLE PHOTOGRAMMETRY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XXXVIII-1/C22 (September 6, 2012): 201–6. http://dx.doi.org/10.5194/isprsarchives-xxxviii-1-c22-201-2011.

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SAKURAI, Shuji, and Osamu JOH. "FUNDAMENTAL STUDY ON APPLICABILITY OF AERIAL PHOTOGRAMMETRY IN SURVEYING ROOF SNOW DEPTHS." Journal of Structural and Construction Engineering (Transactions of AIJ) 450 (1993): 25–35. http://dx.doi.org/10.3130/aijsx.450.0_25.

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Moloney, Julia G., Mike J. Hilton, Pascal Sirguey, and Tom Simons-Smith. "Coastal Dune Surveying Using a Low-Cost Remotely Piloted Aerial System (RPAS)." Journal of Coastal Research 345 (September 2018): 1244–55. http://dx.doi.org/10.2112/jcoastres-d-17-00076.1.

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Hodgson, Amanda, Natalie Kelly, and David Peel. "Unmanned Aerial Vehicles (UAVs) for Surveying Marine Fauna: A Dugong Case Study." PLoS ONE 8, no. 11 (November 4, 2013): e79556. http://dx.doi.org/10.1371/journal.pone.0079556.

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Xia, Gui-Song, Mihai Datcu, Wen Yang, and Xiang Bai. "Information processing for unmanned aerial vehicles (UAVs) in surveying, mapping, and navigation." Geo-spatial Information Science 21, no. 1 (January 2, 2018): 1. http://dx.doi.org/10.1080/10095020.2017.1420510.

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Faltýnová, Martina, and Karel Pavelka. "Aerial Laser Scanning in Archeology." Geoinformatics FCE CTU 6 (December 21, 2011): 103–8. http://dx.doi.org/10.14311/gi.6.14.

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Technology of aerial laser scanning is often well used for a DTM generation. The DTM (digital surface model) displayed in appropriate form, e.g. shaded surface, can be used as a data source for searching for archaeological sites. Aerial laser scanning data acquisition is unfortunately too expensive for non-commercial projects. It can be solution to use the ALS data acquired primarily for another reason by public service. This data has in general lower density, than expensive custom-made data, but can be borrowed for research purpose in a limited size. We tested the data from The Czech Office for Surveying, Mapping and Cadastre. The aim was to find, if it is possible to use data characterized by density of about 1 point/m2 for archaeological research. We used the DTM in form of shaded surface and inspect the data around few well known archaeological sites from different periods. It is also possible to use different outputs from the original DTM to better display terrain discontinuities, which could be caused by human activity.

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Thuestad, Alma Elizabeth, Ole Risbøl, Jan Ingolf Kleppe, Stine Barlindhaug, and Elin Rose Myrvoll. "Archaeological Surveying of Subarctic and Arctic Landscapes: Comparing the Performance of Airborne Laser Scanning and Remote Sensing Image Data." Sustainability 13, no. 4 (February 10, 2021): 1917. http://dx.doi.org/10.3390/su13041917.

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What can remote sensing contribute to archaeological surveying in subarctic and arctic landscapes? The pros and cons of remote sensing data vary as do areas of utilization and methodological approaches. We assessed the applicability of remote sensing for archaeological surveying of northern landscapes using airborne laser scanning (LiDAR) and satellite and aerial images to map archaeological features as a basis for (a) assessing the pros and cons of the different approaches and (b) assessing the potential detection rate of remote sensing. Interpretation of images and a LiDAR-based bare-earth digital terrain model (DTM) was based on visual analyses aided by processing and visualizing techniques. 368 features were identified in the aerial images, 437 in the satellite images and 1186 in the DTM. LiDAR yielded the better result, especially for hunting pits. Image data proved suitable for dwellings and settlement sites. Feature characteristics proved a key factor for detectability, both in LiDAR and image data. This study has shown that LiDAR and remote sensing image data are highly applicable for archaeological surveying in northern landscapes. It showed that a multi-sensor approach contributes to high detection rates. Our results have improved the inventory of archaeological sites in a non-destructive and minimally invasive manner.

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Brecher, H. H. "Surface Velocity Determination on Large Polar Glaciers by Aerial Photogrammetry." Annals of Glaciology 8 (1986): 22–26. http://dx.doi.org/10.1017/s0260305500001063.

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Aerial photogrammetric block triangulation, a standard and well-developed technique for extending accurate control for mapping into the interior of a region from a few points of known position on its perimeter, can be readily adapted to determine surface velocities on bodies of ice which are too large, and often too crevassed, to be studied effectively by conventional ground surveying. Velocities are calculated from the changes in positions of the same natural surface features determined from photography of two (or more) epochs and the elapsed time. This method is capable of providing many uniformly-spaced measurements over the whole, moving, ice surface, thus allowing the production of maps of velocity and strain-rate, which are valuable in analyzing the ice-flow regime. Results from measurements completed some years ago on Byrd Glacier, one of the largest outlet glaciers from the East Antarctic plateau, are presented as an example of what the method can yield. By means of Doppler satellite surveying, relative positions of control points for each photography epoch can be determined with sub-meter accuracy, making the technique suitable also in regions where no fixed land features exist. A brief description of a project under way in such an area, on Ice Stream B in West Antarctica, is given.

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Brecher, H. H. "Surface Velocity Determination on Large Polar Glaciers by Aerial Photogrammetry." Annals of Glaciology 8 (1986): 22–26. http://dx.doi.org/10.3189/s0260305500001063.

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Aerial photogrammetric block triangulation, a standard and well-developed technique for extending accurate control for mapping into the interior of a region from a few points of known position on its perimeter, can be readily adapted to determine surface velocities on bodies of ice which are too large, and often too crevassed, to be studied effectively by conventional ground surveying. Velocities are calculated from the changes in positions of the same natural surface features determined from photography of two (or more) epochs and the elapsed time. This method is capable of providing many uniformly-spaced measurements over the whole, moving, ice surface, thus allowing the production of maps of velocity and strain-rate, which are valuable in analyzing the ice-flow regime. Results from measurements completed some years ago on Byrd Glacier, one of the largest outlet glaciers from the East Antarctic plateau, are presented as an example of what the method can yield. By means of Doppler satellite surveying, relative positions of control points for each photography epoch can be determined with sub-meter accuracy, making the technique suitable also in regions where no fixed land features exist. A brief description of a project under way in such an area, on Ice Stream B in West Antarctica, is given.

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Dueholm, K. S., and A. K. Pedersen. "Geological photogrammetry using oblique aerial photographs." Rapport Grønlands Geologiske Undersøgelse 140 (December 31, 1988): 33–38. http://dx.doi.org/10.34194/rapggu.v140.8029.

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Large areas in Greenland are covered by oblique aerial photographs, taken with 23 x 23 cm2 photogrammetric cameras of the type 'EagIe' between 1948 and 1953. Though almost all of Greenland is now covered by modem vertical photographs, the oblique photographs still represent a valuable alternative source of geological information because of the perspective at right angles to the mountain side. So far, geologists have only been able to use the oblique photographs for visual interpretation. New photogrammetric instruments like the Kem DSR U/GPl Analyticai Plotter at the Institute of Surveying and Photogrammetry,the Teehnieal University of Denmark, make it possibie for geologists to map precisely from oblique photographs. This report deseribes an experiment where such photographs have been used for mapping of steep mountain sides for the production of geological maps, cross-seetions and perspective views. Earlier results are reported by Dueholm & Garde (1986) and Heinesen (1987).

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Park, Sebeom, and Yosoon Choi. "Applications of Unmanned Aerial Vehicles in Mining from Exploration to Reclamation: A Review." Minerals 10, no. 8 (July 26, 2020): 663. http://dx.doi.org/10.3390/min10080663.

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Over the past decade, unmanned aerial vehicles (UAVs) have been used in the mining industry for various applications from mineral exploration to mine reclamation. This study aims to review academic papers on the applications of UAVs in mining by classifying the mining process into three phases: exploration, exploitation, and reclamation. Systematic reviews were performed to summarize the results of 65 articles (June 2010 to May 2020) and outline the research trend for applying UAVs in mining. This study found that UAVs are used at mining sites for geological and structural analysis via remote sensing, aerial geophysical survey, topographic surveying, rock slope analysis, working environment analysis, underground surveying, and monitoring of soil, water, ecological restoration, and ground subsidence. This study contributes to the classification of current UAV applications during the mining process as well as the identification of prevalent UAV types, data acquired by sensors, scales of targeted areas, and styles of flying control for the applications of UAVs in mining.

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Journal articles on the topic 'Aerial surveying'

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