Tesis sobre el tema "GIS method"
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Jani, Janmaizatulriah. "A GIS-based method for groundwater modelling". Thesis, University of Sheffield, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574558.
Texto completoYesilmurat, Serdar. "A Prefetching Method For Interactive Web Gis Applications". Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611639/index.pdf.
Texto completoprefetching&rdquo
. Via prefetching, caching mechanisms can be used more effectively and efficiently. This study proposes a prefetching algorithm called Retrospective Adaptive Prefetch (RAP). The algorithm is constructed over a heuristic method that takes the former actions of the user into consideration. This method reduces the user-perceived response time and improves users&rsquo
navigation efficiency. The caching mechanism developed takes the memory capacity of the client machine into consideration to adjust the cache capacity by default. Otherwise, cache size can be configured manually. RAP is compared with 4 other methods. According to the experiments, this study shows that RAP provides better performance enhancements than the other compared methods.
Andersson, Emilia. "GIS as a method for handling environmental data from Antarctica". Thesis, KTH, Industriell ekologi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32774.
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Lenander, Ann-Sofi. "A GIS-Based Method of Deriving Spatially Distributed Unit Hydrographs". Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297671.
Texto completoInnan det blev vanligt att använda hydrauliska och rumsliga modellerings- mjukvaror användes ofta teorin bakom enhetshydrografen för modellering av avrinning. Medan de rumsliga mjukvarorna ofta erbjuder detaljerade resultat till priset av långa beräkningstider, har enhetshydrografen ifrågasatts för att förenkla den fysiska karaktären av avrinningsområdet. Typiskt sett tar inte enhetshydrografen avrinningsområdets flödesvägar direkt i hänseende vid beräkning. Utveckling och ökad tillgänglighet av geografiska informations- system förenklade möjligheterna att utveckla beräkning av enhetshydrografer som tar hänsyn till avrinningsområdets karaktär, typiskt sett genom att beräkna rinntiden från varje läge i avrinningsområdet, längs rinnvägarna och till utloppet. I den här studien beräknas spatiala enhetshydrografer separat för avrinningsområdets hårdgjorda och icke hårdgjorda ytor, genom att utveckla ett Python skript med hjälp av karalgebra och Esri’s wrapper modul ArcPy. Rinntiderna från olika lägen i avrinningsområdet beräknas med Maidments och Oliveras formel för hastighet, vilken innehåller okända parametrar för en uppskattad medelhastighet samt två kalibreringsparametrar. Effektivt regn från ett Chicago Design Storm regn med en återkomsttid på 100 år beräknas med hjälp av SCS-CN metoden. Hydrograferna för direkt avrinning faltas för tre semi-urbana avrinningsområden i Smedby i södra Sverige för att sedan jämföras mot MIKE 21 genererad hydrograf data för respektive motsvarade avrinningsområde. Hydrografdata producerat av MIKE 21 har tagits fram med lika CDS-regn data som input. Resultatet visar att hydrografer snarlika MIKE 21 hydrograferna kan tas fram med Maidments spatialt fördelade enhetshydrograf, om de okända parametrarna i Maidments formel kalibrerades mot MIKE 21 data. Utan kalibreringsdata för att bestämma de okända parametrarna kan resultatet anses vara mycket osäkert, vilket antyder att Python skriptet ej bör användas för använda metoden för att förutspå responser av regnevent. Andra beräkningar än Maidments ekvation kan vara av intresse att implementera. Olika typer av regninput samt spatial data över andra platser än Smedby kan vara av intresse att testa Python skriptet för.
Pirnia, Seyed Amir. "A Groundwater Vulnerability Assessment Method Using GIS and Multivariate Statistics - Gotland, Sweden". Thesis, KTH, Mark- och vattenteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99343.
Texto completoDickerson, Thomas Ashby. "Development and Evaluation of the Profile Synthesis Method for Approximate Floodplain Redelineation". Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/35847.
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This research develops a profile synthesis method for redelineation of approximate flood boundaries, and evaluates the methodâ s performance and usability. The profile synthesis method is shown to perform reliably on simple floodplain geometry, recreating a water surface profile based only on its floodplain boundaries. When applied to a real-world floodplain studied in a previous flood insurance study, the profile synthesis method is shown to perform adequately, with results comparable to an approximate hydraulic model developed in HEC-RAS. Methods similar to this profile synthesis method for reuse of existing approximate zone boundaries have not been widely documented or evaluated; nevertheless, methods such as this are believed to be common in the revision of approximate zone flood boundaries. As such, this work explores concepts which will be of interest to individuals actively involved in flood map revision and modernization.
Master of Science
Chen, Mi. "Using an integrated linkage method to predict hydrological responses of a mixed land use watershed". Connect to this title online, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu.
Texto completoTitle from first page of PDF file. Document formatted into pages; contains xvi, 378 p.; also includes graphics (some col.). Includes bibliographical references (p. 229-252). Available online via OhioLINK's ETD Center
Argany, Meysam. "Development of a GIS-based method for sensor network deployment and coverage optimization". Doctoral thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/25829.
Texto completoIn recent years, sensor networks have been increasingly used for different applications ranging from environmental monitoring, tracking of moving objects, development of smart cities and smart transportation system, etc. A sensor network usually consists of numerous wireless devices deployed in a region of interest. A fundamental issue in a sensor network is the optimization of its spatial coverage. The complexity of the sensing environment with the presence of diverse obstacles results in several uncovered areas. Consequently, sensor placement affects how well a region is covered by sensors as well as the cost for constructing the network. For efficient deployment of a sensor network, several optimization algorithms are developed and applied in recent years. Most of these algorithms often rely on oversimplified sensor and network models. In addition, they do not consider spatial environmental information such as terrain models, human built infrastructures, and the presence of diverse obstacles in the optimization process. The global objective of this thesis is to improve sensor deployment processes by integrating geospatial information and knowledge in optimization algorithms. To achieve this objective three specific objectives are defined. First, a conceptual framework is developed for the integration of contextual information in sensor network deployment processes. Then, a local context-aware optimization algorithm is developed based on the proposed framework. The extended approach is a generic local algorithm for sensor deployment, which accepts spatial, temporal, and thematic contextual information in different situations. Next, an accuracy assessment and error propagation analysis is conducted to determine the impact of the accuracy of contextual information on the proposed sensor network optimization method. In this thesis, the contextual information has been integrated in to the local optimization methods for sensor network deployment. The extended algorithm is developed based on point Voronoi diagram in order to represent geometrical structure of sensor networks. In the proposed approach sensors change their location based on local contextual information (physical environment, network information and sensor characteristics) aiming to enhance the network coverage. The proposed method is implemented in MATLAB and tested with several data sets obtained from Quebec City spatial database. Obtained results from different case studies show the effectiveness of our approach.
Corner, Robert J. "Knowledge representation in geographic information systems". Thesis, Curtin University, 1999. http://hdl.handle.net/20.500.11937/928.
Texto completoSurmeli, Biricik Gozde. "Relationship Between Settlement Location And Morphological Landform: A Gis Method Applied To Cankiri Province". Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1079292/index.pdf.
Texto completoankiri province, a mountainous terrain, which is covered in seventy-seven sheets of topographic maps at 1:25.000 scale. Three databases are created and used in this study: 1) Settlement database comprising various topographic and landform attributes of 891 settlements, 2) Morphological landform database composed of 4042 landform polygon elements digitized from 1:25.000 topographic maps, and 3) Topographic database containing the digital elevation model of the area and its derivatives. The first step in the algorithm is to classify the area into four main landform classes, namely, valley, slope, flood and top. Unsuitable landforms are then clipped out based on the thresholds derived from three topographic properties (elevation, slope and aspect). Accordingly, about 2 % of the settlements and 12 % of the area are removed. The relationship is investigated using the percentages of remaining settlements and landform classes. Further analyses such as position of the settlement within the landform polygon and type of the nearest landforms are carried out for final interpretation. Following conclusions are reached on the relationship between settlement location and morphological landforms: - Percentages of settlements for flood, valley, slope and top are 8.37, 27.52, 58.60 and 5.50, respectively. Considering the percentages of the landforms provided in the area, however, valley is the most preferred landform followed by flood type. Slope and top landforms are less preferred. About 86 % of the settlements are concentrated along valley-slope boundary. - Morphological boundaries of flood and top landforms are consistent with the settlement zones. The valley-slope boundary, on the other hand, which is the most populated area, cross-cut the settlements zones.
Staron, Scott David. "A GIS-based method to target subwatershed areas according to agricutural phosphorus loading potential". The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1244832873.
Texto completoSwart, Conrad Dirk. "Developing a GIS based method for school site identification in the rural Eastern Cape". Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018939.
Texto completoStaron, Scott David. "A GIS-based method to target subwatershed areas according to agricultural phosphorus loading potential /". Connect to resource, 1995. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1244832873.
Texto completoBílek, Ondřej. "Geografické informační systémy". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220325.
Texto completoUysal, Furkan. "A Gps/gis Based Line Of Balance Method For Planning And Control Of Construction Projects". Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/2/12608624/index.pdf.
Texto completoTufekci, Nesrin. "Gis Based Geothermal Potential Assessment For Western Anatolia". Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607651/index.pdf.
Texto completoYikmaz, Riza Fikret. "Development Of Gis Based Trajectory Statistical Analysis Method To Identify Potential Sources Of Regional Air Pollution". Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611969/index.pdf.
Texto completordal Tuncel Co-supervisor: Assoc. Prof. Dr. Zuhal Akyü
rek May 2010, 186 pages Apportionment of source regions affecting a certain receptor in the regional scale is necessary information for air quality management and development of national policy for exchange of air pollutants with other countries. Source region apportionment can be studied either through numerical modeling or by using trajectory statistics that is a hybrid methodology of modeling and measurements. Each of these approaches has their advantages and disadvantages. In this study treatment of back-trajectory segments in Potential Source Contribution Function (PSCF), which is one of the tools used in trajectory statistics will be investigated, to increase the reliability of the apportionment process. In the current method run in GIS, especially two parameters gains importance. One is that the vertical locations of trajectory segments are not taken into account at present. In this study, how the evaluation of the segments in 3-D instead of 2-D could improve the results will be assessed. The other parameter that is rainfall at each segment will be included in the PSCF calculations and its effects on the spatial distribution of PSCF values will be evaluated. A user interface in Geographical Information System (GIS) will be developed for effective use of improved methodology.
Deuling, Medina J. "Quantification and assessment of caribou habitat fragmentation, an integrated remote sensing, GIS, and landscape ecology method". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0017/MQ49605.pdf.
Texto completoBalram, Shivanand. "Collaborative GIS process modelling using the Delphi method, systems theory and the unified modelling language (UML)". Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85881.
Texto completoThis dissertation examines the above issues through the design, implementation, and assessment of the Collaborative Spatial Delphi (CSD) Methodology. The CSD methodology facilitates spatial thinking and discursive strategies to describe the complex social-technical dynamics associated with the knowledge-structuring-consensus nexus of the participation process. The CSD methodology describes this nexus by synthesizing research findings from knowledge management, focus group theory, systems theory, integrated assessment, visualization and exploratory analysis, and transformative learning all represented within a collaborative geographic information system (GIS) framework.
The CSD methodology was implemented in multiple contexts. Its use in two contexts - strategic planning and management of urban green spaces in Montreal (Canada); and priority setting for North American biodiversity conservation - are reported in detail in this dissertation. The summative feedbacks from all the CSD planning workshops help incrementally improve the design of the CSD process. This dissertation also reports on the design and use of questionnaire surveys to incorporate local realities into planning, as well as the development of an evaluation index to assess the face validity and effectiveness of the CSD process from the perspective of workshop participants.
The accumulated evidence from the CSD implementations suggests that many core issues exist across spatial problem solving situations. Thus, the design and specification of a core collaborative process model provides benefits for knowledge exchange. General systems theory was used to classify the core technical components of the collaborative GIS design, and soft systems theory was used to characterize the human activity dynamics. Object oriented principles enabled the generation of a flexible domain model, and the unified modelling language (UML) visually described the collaborative process. The CSD methodology is used as a proof of concept.
This dissertation contributes to knowledge in the general areas of Geography, Geographic information systems and science, and Environmental decision making. The specific contributions are threefold. First, the CSD provides a synthesis of multi-disciplinary theories and a tested tool for environmental problem solving. Second, the CSD facilitates a fusion of local and technical knowledge for more realistic consensus planning outcomes. Third, an empirical-theoretical visual formalism of the CSD allows for process knowledge standardization and sharing across problem solving situations.
Corner, Robert J. "Knowledge representation in geographic information systems". Curtin University of Technology, School of Spatial Sciences, 1999. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=11740.
Texto completoEkberg, Fredrik. "An approach for representing complex 3D objects in GIS applied to 3D properties". Thesis, University of Gävle, Department of Technology and Built Environment, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-139.
Texto completoThe main problem that is addressed in this thesis is how to represent complex three-dimensional objects in GIS in order to render a more realistic representation of the real world. The goal is to present an approach for representing complex 3D objects in GIS. This is achieved by using commercial GIS (ArcGIS), applied to 3D properties. In order to get a clear overview of the state-of-the-art of 3D GIS and the current 3D cadastral situation a literature study was carried out. Based on this overview it can be concluded that 3D GIS still is in its initial phase. Current 3D GIS developments are mainly in the area of visualisation and animation, and almost nothing in the area of spatial analysis and attribute handling. Furthermore, the literature study reveals that no complete solution has been introduced that solves the problems involved in 3D cadastral registration. In several countries (e.g. Sweden, Denmark, Norway, Netherlands, Israel, and Australia) 3D properties exists in a juridical framework, but technical issues such as how to represent, store, and visualize 3D properties has not yet been solved. Some countries (Sweden, Norway, and Australia) visualize the footprints of 3D property units in a base map. This approach partly solves some technical issues, but can only represent 3D objects in a 2.5D environment. Therefore, research in how to represent complex objects in GIS as ‘true’ 3D objects is of great need.
This thesis will emphasize MultiPatch as a geographic representation method to represent complex 3D objects in GIS. A case study will demonstrate that complex objects can be visualized and analysed in a commercial GIS, in this case ArcGIS. Most commercial GIS software available on the market applies a 2.5D approach to represent 3D objects. The 2.5D approach has limitations for representing complex objects. There is therefore a need of finding new approaches to represent complex objects within GIS. The result shows that MultiPatch is not an answer to all the problems within 3D GIS but a solution to some of the problems. It still requires a lot of research in the field of 3D GIS, especially in development of spatial analysis capabilities.
Det huvudsakliga problemet i denna uppsats är hur komplexa tre-dimensionella objekt kan representeras i GIS för att återge verkligheten mer realistiskt. Målet är att presentera ett tillvägagångssätt för att representera komplexa 3D-objekt i GIS. Detta har uppnåtts genom att använda ett kommersiellt GIS tillämpat på 3D-fastigheter. En litteraturstudie har genomförts för att erhålla en klar översikt över det senaste inom 3D-GIS och över den aktuella situationen inom 3D-fastigheter. Grundat på översikten kan slutsatsen dras att 3D-GIS bara är i sin begynnelsefas. Den aktuella utvecklingen inom 3D-GIS har huvudsakligen fokuserat på visualisering och animering och nästan ingenting inom rumsliga analysmetoder och hantering av attribut. Litteraturstudien visar också att ingen fullständig lösning för de problem som finns inom 3D-fastighetsregistrering har introducerats. I flera länder, t.ex. Sverige, Danmark, Norge, Nederländerna, Israel och Australien, existerar 3D-fastigheter idag i juridiska termer, men de tekniska problemen som t.ex. hur 3D-fastigheter ska representeras, lagras och visualiseras har inte ännu lösts. Vissa länder (Sverige, Norge och Australien) visualiserar idag en projektion av 3D-fastigheterna på en fastighetskarta. Den här metoden löser endast några av de tekniska problemen och kan endast representera 3D-objekt i en 2,5D-miljö. Därför är forskning inom hur komplexa objekt kan representeras i GIS som s.k. ”sann” 3D av betydelse.
Den här uppsatsen framhäver MultiPatch som en datatyp för att representera komplexa 3D-objekt i GIS. En fallstudie visar att komplexa objekt kan visualiseras och analyseras i ett kommersiellt GIS, i det här fallet ArcGIS. De flesta kommersiella GIS som är tillgängliga på marknaden använder 2,5D-metoden för att representera 3D-objekt. 2,5D-metoden har vissa begränsningar för att representera komplexa objekt och därför finns det ett behov att finna nya tillvägagångssätt för att representera komplexa objekt inom GIS. Resultaten kommer att visa att MultiPatch inte är någon fullständig lösning till alla problem inom 3D-GIS men en lösning på några av problemen. Det krävs fortfarande mycket forskning inom 3D-GIS, särskilt inom utveckling av rumsliga analysmetoder.
Stratton, Richard D. "A Geographic Information System Assessment Method for Fire Management: Identifying Fire Danger Areas". DigitalCommons@USU, 1998. https://digitalcommons.usu.edu/etd/7323.
Texto completoDI, ZHAO. "Using GIS-based Multi-criteria Analysis for Optimal Site Selection fora Sewage Treatment Plant". Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-19020.
Texto completoKanani, Saleh. "A method to evaluate database management systems for Big Data : focus on spatial data". Thesis, Luleå tekniska universitet, Datavetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74172.
Texto completoErdogan, Emre. "Effect Of Bright Sunshine Duration On The Selection Of Settlement Location: A Gis Method Applied To Cankiri Province". Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605487/index.pdf.
Texto completoankiri province, which is located at northeast of Ankara and covers approximately an area of 8380 km2. Three main data sets of the study area are used in this thesis: 1) Settlement data containing the coordinates, IDs and names of the 891 settlement points, 2) Topographic data containing the coordinates and digital elevation values of all raster pixels 3) Bright sunshine duration data (BSD) composed of the difference between sunset and sunrise times for all raster pixels. In the first step of this study, sunrise and sunset times of the study area are calculated with an algorithm that uses Digital Elevation Model. This algorithm is developed specifically for computing those times over a topographic surface which may delay the sunrise time or bring forward the sunset time, thus reducing the BSD. In the second step, unsuitable landforms for settlement are clipped out from the study area based on the thresholds derived from elevation, slope and aspect parameters. Then, BSD histograms and statistics of the settlements and study area are compared for each of the 12 months and for the average of 12 months. Finally, neighborhood analysis on settlements is carried out by comparing the BSD values of each settlement with the BSD characteristics of circular buffer surrounding the settlement. The main conclusion derived from above mentioned analysis is that the BSD does not directly affect the selection of the settlement sites.
Skeppström, Kirlna. "Radon in Groundwater- Influencing Factors and Prediction Methodology for a Swedish Environment". Licentiate thesis, KTH, Land and Water Resources Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-491.
Texto completoThis thesis presents a method for predicting radon (222Rn) levels in groundwater on a general scale, within an area of approximately 185 x 145 km2. The method applies to Swedish conditions, where 222Rn is the main contributor to natural radioactivity. Prediction of radon potential in groundwater is complex because there are many different factors affecting radon content, including geochemical and flow processes. The proposed method is based on univariate and multivariate statistical analyses and investigated the influence of different factors such as bedrock, soils, uranium distribution, altitude, distance to fractures and land use. A statistical variable based method (the RV method) was used to estimate risk values related to different radon concentrations. The method was calibrated and tested on more than 4400 drilled wells in Stockholm County. The weighted index (risk value) estimated by the RV method provided a fair prediction of radon potential in groundwater on a general scale. The RV method was successful in estimating the median radon concentration within 12 subregions (at a local scale, each of area 25 x 25 km2), based on weighted index values obtained from half of all wells tested. A high correlation between risk values and median radon concentrations was demonstrated. The factors bedrock, altitude, distance to fracture zone and distribution of uranium in bedrock were found to be significant in the prediction approach on a general scale. Visual data mining, which comprised analysis of 3D images, was a useful tool for data exploration but could not be used as an independent method for drawing conclusions regarding radon in groundwater. Results of a field study based on 38 drilled wells on the island of Ljusterö in the Stockholm archipelago showed that 222Rn concentrations in groundwater were weakly correlated to the parent elements (226Ra and 238U) in solution.
Dahlgren, Susanna. "Design and Evaluation of a Visualization Method in a GIS for Complex Electronic Warfare Assessment with Regards to Usability". Thesis, Linköpings universitet, Interaktiva och kognitiva system, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157965.
Texto completoMekonnen, Addisu Dereje. "Wind Farm Site Suitability Analysis in Lake Erie Using Web-Based Participatory GIS (PGIS)". Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1392975809.
Texto completoThomelius, Samuel. "Kommunikationens landskap : En studie av kommunikation i två gotländska socknar". Thesis, Uppsala universitet, Arkeologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-324729.
Texto completoErener, Arzu. "An Approach For Landslide Risk Assesment By Using Geographic Information Systems (gis) And Remote Sensing (rs)". Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12611314/index.pdf.
Texto completobased mapping unit.
Mou, Lei. "Toward a customized privacy preservation method in mobile tourism applications". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAM063.
Texto completoThe rapid development of ICT(Information and Communication Technology) brought huge impact to all industries. Mobile internet, Web 2.0, positioning technology are deployed world-widely, that initialized inner request of new technologies in the field of tourism as well. By enjoying the convenience brought by new technologies, more and more users starting to focus on privacy issues.As known, there is a contradiction between the quality of recommended location-based services and privacy. Detailed user profile and precise location information are needed for providing location-based service with high efficiency and quality, while privacy preservation requires hiding user's profile and location. Many recent researches aims to seek a balance between them, to obtain the best quality of the LBS in the context of the least exposed user profile content and location information.In this thesis, the author focused mainly on the privacy of mobile user profile, which covers both personal characteristics and location information.1, Customized user privacy model considering both personal attributes and spatial and temporal location is defined for mobile user.In this research, we proposed customized privacy model for every user to define, his/her own meaning of privacy. With this model, for different travel purpose, or even for different time and location, they can have different definitions for their privacy.2, Minimized the data to be stored on server.Profiles are stored in two different ways, complete profile is stored on the client side, and only the values of the attributes that are able for the users to share are stored on the server side, thus minimized the data to be stored on server.3, Customized levels of granularity of disclosure of location and time are adjustable for users.For frequently changing attributes such as location and time, user can disclose them with suitable granularity, in order to obtain expected service from the service providers.Keywords: privacy, location, user profile, mobile, tourism
Eddy, Brian G. "A GIS-based fuzzy logic method for mineral potential mapping: An experiment with a geological map of the Parry Islands, Northwest Territories, Canada". Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/9837.
Texto completoHåkansson, Olof. "Stratified Polynesia : A GIS-based study of prehistoric settlements in Samoa and Rapa Nui". Thesis, Uppsala universitet, Institutionen för arkeologi och antik historia, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-331545.
Texto completoDet övergripande syftet med föreliggande studie är att komma närmare den förhistoriska människans upplevelse av varat, att komma närmare hennes upplevelse av att finnas till i världen. Detta görs genom att undersöka fornlämningars spatiala relationer för att förstå hierarkier. I uppsatsen redovisas två databaser och Geografiska Informationssystem som har konstruerats utifrån fornlämningsdata från förhistoriska bosättningar på Samoa i västpolynesien och Rapa Nui i östpolynesien. På Samoa är det Letolodalen på ön Savai´i som undersöks, och på Rapa Nui är det Hanga Ho´onu vid La Pérouse-bukten som undersöks. Uppsatsen ämnar tillgängliggöra opublicerade inventeringar av Letolo på Samoa. En intention är att utarbeta specifika kriterier för att utläsa social information från den spatiala utbredningen av fornlämningar. Arbetet ifrågasätter om det är möjligt att läsa ut graden av hierarki i ett förhistoriskt samhälle utifrån de spatiala relationerna mellan fornlämningar. Svaret är att det går om analogier och förförståelse används då det annars är problematiskt att tillskriva mening till fornlämningar. Eftersom Polynesien är väl dokumenterat utifrån ett etnohistoriskt perspektiv används analogier och förförståelse från dessa berättelser. I uppsatsen undersöks vidare mentala världar och strukturer som visar sig i gruppers upprepade praktiker i de två bosättningarna.
Wickert, Claudia. "Breeding white storks in former East Prussia : comparing predicted relative occurrences across scales and time using a stochastic gradient boosting method (TreeNet), GIS and public data". Master's thesis, Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2007/1353/.
Texto completoDifferent habitat models were created for the White Stork (Ciconia ciconia) in the region of the former German province of East Prussia (equals app. the current Russian oblast Kaliningrad and the Polish voivodship Warmia-Masuria). Different historical data sets describing the occurrence of the White Stork in the 1930s, as well as selected variables for the description of landscape and habitat, were employed. The processing and modeling of the applied data sets was done with a geographical information system (ArcGIS) and a statistical modeling approach that comes from the disciplines of machine-learning and data mining (TreeNet by Salford Systems Ltd.). Applying historical habitat descriptors, as well as data on the occurrence of the White Stork, models on two different scales were created: (i) a point scale model applying a raster with a cell size of 1 km2 and (ii) an administrative district scale model based on the organization of the former province of East Prussia. The evaluation of the created models show that the occurrence of White Stork nesting grounds in the former East Prussia for most parts is defined by the variables ‘forest’, ‘settlement area’, ‘pasture land’ and ‘proximity to coastline’. From this set of variables it can be assumed that a good food supply and nesting opportunities are provided to the White Stork in pasture and meadows as well as in the proximity to human settlements. These could be seen as crucial factors for the choice of nesting White Stork in East Prussia. Dense forest areas appear to be unsuited as nesting grounds of White Storks. The high influence of the variable ‘coastline’ is most likely explained by the specific landscape composition of East Prussia parallel to the coastline and is to be seen as a proximal factor for explaining the distribution of breeding White Storks. In a second step, predictions for the period of 1981 to 1993 could be made applying both scales of the models created in this study. In doing so, a decline of potential nesting habitat was predicted on the point scale. In contrast, the predicted White Stork occurrence increases when applying the model of the administrative district scale. The difference between both predictions is to be seen in the application of different scales (density versus suitability as breeding ground) and partly dissimilar explanatory variables. More studies are needed to investigate this phenomenon. The model predictions for the period 1981 to 1993 could be compared to the available inventories of that period. It shows that the figures predicted here were higher than the figures established by the census. This means that the models created here show rather a capacity of the habitat (potential niche). Other factors affecting the population size e.g. breeding success or mortality have to be investigated further. A feasible approach on how to generate possible habitat models was shown employing the methods presented here and applying historical data as well as assessing the effects of changes in land use on the White Stork. The models present the first of their kind, and could be improved by means of further data regarding the structure of the habitat and more exact spatially explicit information on the location of the nesting sites of the White Stork. In a further step, a habitat model of the present times should be created. This would allow for a more precise comparison regarding the findings from the changes of land use and relevant conditions of the environment on the White Stork in the region of former East Prussia, e.g. in the light of coming landscape changes brought by the European Union (EU).
Napoleone, Sara. "Stima con modelli idrologici del rischio idraulico del Rio Torriane". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.
Buscar texto completoKoehl, Daniel Grant. "Investigating an Apparent Structural High in Seismic Data in North Terre Haute, Indiana, Through First-Arrival Traveltime Tomography and Gravity Analysis". Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1559120344838085.
Texto completoSteer, Lorn Adam. "Site selection for the Small-Scale Aquaculture Farming Systems in the Western Cape : a GIS application". Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/1653.
Texto completoDesai, Khyati Sanket. "Influence of the Choice of Disease Mapping Method on Population Characteristics in Areas of High Disease Burdens". Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc822816/.
Texto completoAyuk, James Ayuk. "Modelling of nonpoint source pollution in the Kuils River Catchment, Western Cape - South Africa". Thesis, University of the Western Cape, 2008. http://hdl.handle.net/11394/3131.
Texto completoZhou, Yan [Verfasser], Rudolf [Gutachter] Liedl, Olaf [Gutachter] Kolditz y Holger [Gutachter] Weiß. "Development of a GIS and model-based method for optimizing the selection of locations for drinking water extraction by means of riverbank filtration / Yan Zhou ; Gutachter: Rudolf Liedl, Olaf Kolditz, Holger Weiß". Dresden : Technische Universität Dresden, 2021. http://d-nb.info/1227833202/34.
Texto completoBaužaitė, Dalia. "Programinės įrangos ir informacinių sistemų priežiūra didelėje organizacijoje". Master's thesis, Lithuanian Academic Libraries Network (LABT), 2007. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20070816_144736-36406.
Texto completoSoftware and information system (IS) maintenance is a rest phase of system life cycle. Maintenance involves about 70 % of all life cycle resources. Software and IS are changing with business environment together. Therefore, there are a lot of methods and techniques for maintenance process analyzing in research theory and applying in practice. However, those practices are starting in Lithuania software maintenance and attending only few groups of IT specialist There are many GIS maintenance researches in publications, but also it is wide range of aspect not including in theory. Therefore, many GIS maintenance processes are analyzing in this paper. The goal of this paper is to analyze all known software maintenance methods and techniques and to define are their used in practice. Research object of this paper is municipality of Klaipeda. This is an organization, with uses usual software and specialized GIS. There were used inquiry questionnaires in this goal research. Finally, by given implications there were proposed software and IS maintenance strategy in municipality of Klaipeda. Like an instance of this strategy, there were given an project of reengineered GIS subsystem.
Lindsey, Daniel Clayton. "A Geospatial Analysis of the Northeastern Plains Village Complex: An Exploration of a GIS-Based Multidisciplinary Method for the Incorporation of Western and Traditional Ecological Knowledge into the Discovery of Diagnostic Prehistoric Settlement Patterns". Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31623.
Texto completoAlmudaris, Sami M. "Measuring Accessibility to Primary Care Physicians in the Nashville Metropolitan Statistical Area". TopSCHOLAR®, 2011. http://digitalcommons.wku.edu/theses/1125.
Texto completoBandreddy, Naga Abhiram. "Defining Correlation Between Radon, Uranium Deposits, and Oil and Gas Wells Using GIS Regression Methods". University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1564687565423414.
Texto completoPopa, Veronica. "Méthode prédictive d'évaluation de la gêne olfactive sur un territoire soumis à une activité industrielle. Approche du potentiel de nuisance et analyse de la vulnérabilité du territoire". Thesis, Montpellier 3, 2013. http://www.theses.fr/2013MON30030.
Texto completoThe increasing environmental stress felt in residential areas leads to an unsafety sensation and to a negative life-quality perception, setting odor annoyance at the heart of environmental issues. Within this context, the research work presented in this doctoral thesis was initiated in order to result in a method allowing to assess and to represent the odor annoyance levels on a given territory. As a consequence, the interest has focused not only on the characteristics of the source and of the exposed targets, but also on their environment during the perception of the olfactory nuisance. To be more precise, the aim of this new approach is to make us able to measure and to forecast the olfactory impact of an existing or a future industry plant on a given territory. The main idea is to represent the level of odor annoyance and its consequences on the territory, in order to reach a best level of industrial plant management in terms of wastes as well as to provide a clear and objective decision support tool for the involved actors. The developed method revolves around two main concepts: the odor annoyance and the economical prejudice of this annoyance on the targeted territory. These two concepts are defined by a group of heterogeneous criteria, organized and aggregated in order to obtain a geographical and environmental operational tool. This tool has been validated for an industrial plant, thus comparing the developed approach to on the spot measurements results. The results of the application of this method came out satisfying and open numerous paths of inquiry
Sedoarisoa, Noëlvia. "Les Impacts des nuisances sonores aériennes : dépréciation immobilière et inégalité sociale? Cas des aéroports de Paris Charles-de-Gaulle,Paris-Orly, Paris-le-Bourget, Lyon Sain-Exupéry et Toulouse-Blagnac". Thesis, Cergy-Pontoise, 2015. http://www.theses.fr/2015CERG0747/document.
Texto completoOver the past 30 years, there has been a significant increase in the air transportation demand and supply. While the fundamental importance of this mode of transport, for modern societies and economies, are generally recognized, it attracts increasing attention from the political class, because of the negative side effects to which it leads. Indeed, air transports cause also negative environmental externalities, in particular noise pollution, which should be evaluated in order to implement corrective policies (taxes, compensation, etc.).In this context, the depreciation of property values and the risk of social segregation caused by aircraft noise have a growing role in the discussions, which are among the major concerns with the health issues of local residents. For several years now, many studies have been conducted in these areas, abroad. Currently, however, studies are still rare in France.Therefore, this thesis aims to: a) analyze and measure the impact of airport platforms on property values and identify the influential variables (aircraft noise, distance to the airport, etc.), analyze possible social inequality in relation to exposure to aircraft noise, c) provide an operational and sustainable decision support tool by setting up an observatory.To address these objectives, a multidisciplinary methodology combining economic (hedonic price method) and geographic (GIS) expertise has been developed. The main originality of this thesis lies in its comparative approach on a national level, highlighting the specificities of the different territories studied. The territories studied cover all communes located in or close to the noise zones (noise exposure map “Plan d'Exposition au Bruit (PEB)”) of each airport concerned. The airports studied concern both Paris airports (Paris- CDG and Paris-Orly), as well as those of provinces (Lyon Saint-Exupery and Toulouse-Blagnac)
NOGUEIRA, Annyella Kássia. "Uso de geoprocessamento para mapeamento de vulnerabilidade como instrumento de gestão de águas subterrâneas em Aparecida de Goiânia/GO". Universidade Federal de Goiás, 2010. http://repositorio.bc.ufg.br/tede/handle/tde/607.
Texto completoThe research developed sought to contribute to the conservation of groundwater resources, aiming in developing a Geographic Information System (GIS) as a tool to manage the use of groundwater targeting the sustainable use, for public supply in the city of Aparecida de Goiânia/GO. In order to achieve this, a Geographic Information System (GIS) was used for the registration of deep wells, continuing the research with a study of natural vulnerability by mapping the information obtained wich relates the potential sources of contamination. Data collection took place through a consultation with the Information System for Groundwater (SIAGAS) and through the System of Statistics and Geographic Information of the State of Goiás (SIEG). Through the database development it was possible to apply the DRASTIC method adapted by Narciso and Gomes (2005) and GOD method proposed by Foster and Hirata (1988) for mapping vulnerability to contamination of groundwater resources. In order to apply the DRASTIC method adapted, maps were generated for slope, land use, geology, geomorphology, water resources and human occupation. The map resulting from this method shows four classes: low, medium, high and very high, showing that of the 288 square kilometers of this city, almost 80% were classified as having medium vulnerability fir the groundwater quality. For the GOD method, maps of the degree of hydraulic confinement, geology and depth or distance of the groundwater level were generated. The map resulting from this process had only three classes: negligible, low and high, showing that 76% of the area was classified as having a negligible vulnerability. This occurred because this method does not consider human occupation.
A pesquisa desenvolvida buscou contribuir para a conservação dos recursos hídricos subterrâneos, tendo como objetivo o desenvolvimento de um Sistema de Informação Geográfica (SIG) como instrumento de gestão para a utilização das águas subterrâneas visando o seu uso sustentável, para o abastecimento público na cidade de Aparecida de Goiânia/GO. Para atingí-lo utilizou-se um Sistema de Informações Geográficas (SIG) para o cadastramento dos poços tubulares profundos, procedendo assim ao estudo da vulnerabilidade natural, através do mapeamento das informações obtidas, além de relacionar as fontes potenciais de contaminação. A obtenção dos dados deu-se através da consulta ao Sistema de Informações de Águas Subterrâneas (SIAGAS) e através do Sistema Estadual de Estatística e de Informações Geográficas de Goiás (SIEG). Estes dados possibilitaram a elaboração do banco de dados e a aplicação do método DRASTIC adaptado por Narciso e Gomes (2005) e do método GOD proposto por Foster e Hirata (1988), para a geração de mapas de vulnerabilidade à contaminação dos recursos hídricos subterrâneos. Para a elaboração do método DRASTIC adaptado foram gerados os mapas de declividade, uso do solo, geologia, falhas geológicas, recursos hídricos e ocupação humana. O mapa resultante desse método apresentou quatro classes: baixa, média, alta e muito alta, sendo que dos 288 quilômetros quadrados deste município, aproximadamente 80% foi classificado como tendo vulnerabilidade média para a qualidade das águas subterrâneas. Para o método GOD foram gerados os mapas de grau de confinamento hidráulico, ocorrência do substrato litológico e profundidade ou distância do nível da água subterrânea. O mapa resultante desse processo apresentou apenas três classes: desprezível, baixa e alta, sendo que 76% da área foi classificado como vulnerabilidade desprezível, por este método não considerar a ocupação humana.
Reichenbacher, Tumasch. "Eine Methode für den Wissenserwerb in der kartographischen Generalisierung duch Interaktionsaufzeichnung und induktives Lernen /". Zürich : Geographisches Institut, 1996. http://www.geo.unizh.ch/gis/research/geoprocessing/gp-abst30.shtml.
Texto completoMbolo, Noah Phanuel Séraphine. "Développement d’une méthode de mesure de charges d’espace appliquée aux isolateurs de postes sous enveloppe métallique (PSEM) pour la haute tension à courant continu". Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTS038/document.
Texto completoThe trend today is to develop high voltage direct current (HVDC) technology for the future electric network because it offers some advantages for the transmission on long distances. The development of HVDC networks leads to an increasing need of gas insulated substations (GIS). A problem to be dealt with when an insulator is subjected to a continuous electric field is the variation of the resistivity with the electric field and the temperature and the accumulation of space charges that can lead to dielectric breakdown. In alumina-filled epoxy resin, used as insulating material for GIS spacer, the influence of space charge start to come out when the electric fields exceed several kV/mm, corresponding to values envisaged for the future HVDC GIS.Despite that non-destructive methods exist to determine the space charge distribution in solid insulators, none of them are directly applicable to insulation structures installed in the HVDC GIS.So, the main objective of this work is to design and set up a measurement technique to observe the internal electric field and the accumulated charges. The developed method must be non-destructive and adapted for a cylindrical geometry of an insulator used as a busbar insulation support.By using the experimental bench set up, the behavior of the composite material regarding the space charge will be studied, in particular according to different thermoelectric stresses. The final aim is to contribute to the optimization of the design of this type of insulator, based on the results from space charge measurements
ABU, KHALAF MOTASEM. "Environmental impacts assessment and horizons of rehabilitation of abandoned limestone quarries: a case study from the Southern part of the West Bank". Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1256.
Texto completoThe stone quarries in the West Bank were long excavated to meet the increasing demand for building material. Until to date of this search, there exist no plans for post-quarrying use of the abandoned sites. Quarries that are left untreated after closure cause extensive land disturbances and have negative safety and environmental impacts. The impact is ranging from the removal of the original ecosystems, the significant change of the original topography, the irreversible disruption of the fundamental ecological relations, and the reduced biodiversity. The core of this study is the evaluation of the environmental risks resulted from the stone quarries in the southern part of the West Bank are and the aspects of rehabilitating abandoned quarries and their future designation land use, emphasizing the theme of abandoned quarries in the study area. The area of interest of 80 km2 was determined and delineated based on the distribution of quarries and the surrounding urbanized clusters. Quarrying sites are divided into nine clusters and about fourty quarries outside these clusters. Each cluster was delineated and described in terms of its area and the number of quarries. The location of each quarry outside and inside cluster was also determined using aerial photographs. To provide the data necessary for the assessment of environmental risks and land-use planning tools, the physical and demographic statuses of the area were described. The quarry were examined and potential impacts on the surrounding land-uses were identified during a site visits to the area. Various thematic geographic features have been included in the analysis and evaluation of the quarries negative environmental impacts. The following environmental impacts were addressed according to the collected data:-(Environmental Pollution which includes”air pollution/Noise pollution/water pollution/soil pollution”;effects on land use;effects on biodiversity;effects on landscape and socio-economical effects). During the study period, many site and field visits were carried out to several abandoned quarries in the study area. In the other hand, several visits to the Municipalities of the main three cites of our study area were carried out. A literature survey for all the related material to stone and marble industry was carried out since the beginning of the research. It included the publications of the Stone and Marble Industry Union and other applied researches published by researchers from the local universities and scientific institutions, publications of the Environmental Quality Authority (EQA), Ministry of National Economy, Ministry of Agriculture ,Municipalities of the four towns and the Palestinian Central Bureau of Statistics (PCBS). As to the area delineation part, a detailed, intensive and comprehensive work using the Geographical Information System (GIS) was done, the physical and demographic statuses of the area were being described. The quarry sites and their areas have been examined. Physical features and population data for the whole area were collected and inserted into the GIS structure. These data could be displayed as follows:-(Land cover/use, topography, soil, geology, main and local roads and the built up area clusters). Final recommendations have been divided into general long term addressed to governmental and planning bodies and Practical short term recommendations are addressed for any organization which can sponsor implementing rehabilitation programs for some of the recommended sites. The ranked post-closure uses proposed in this study response to the specific land use needs are: land reclamation for agricultural purposes or development projects (playing fields with retail services, gardens, composting facility, temporary water reservoir, housing units and health center). According to the collected data and analysis, the optimal land use of these abandoned quarries was determined according to the characteristics of their nearby environment and their physical and demographic status. In the present study, an environmental database was created by using Geographic Information Systems (GIS), and by cross-checking data of abandoned quarries and their location according to different designated planning areas with the locality development priorities and needs that were set by the administrative authorities of the surrounding area. The research findings show that more abandoned quarries are located in areas designated for conservation than in areas intended for development projects. Therefore, abandoned quarries that are located in conservation areas should be rehabilitated as open spaces. Those in urban and rural areas should be rehabilitated as development projects, or as open spaces and agricultural land uses, or as combined land uses.