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Modeling uncertainty of moving objects on road networks via space- time prims / Bart Kuijpers in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1095 - 1117 Titre : Modeling uncertainty of moving objects on road networks via space- time prims Type de document : Article/Communication Auteurs : Bart Kuijpers, Auteur ; Walied Othman, Auteur Année de publication : 2009 Article en page(s) : pp 1095 - 1117 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse spatio-temporelle [Termes IGN] base de données d'objets mobiles [Termes IGN] incertitude de position [Termes IGN] logiciel de calcul scientifique [Termes IGN] Mathematica [Termes IGN] modélisation spatio-temporelle [Termes IGN] objet mobile [Termes IGN] réseau routier [Termes IGN] visualisation 3D Résumé : (Auteur) Moving objects produce trajectories, which are typically observed in a finite sample of time-stamped locations. Between sample points, we are uncertain about the moving objects's location. When we assume extra information about an object, for instance, a (possibly location-dependent) speed limit, we can use space-time prisms to model the uncertainty of an object's location. Until now, space-time prisms have been studied for unconstrained movement in the 2D plane. In this paper, we study space-time prisms for objects that are constrained to travel on a road network. Movement on a road network can be viewed as essentially one-dimensional. We describe the geometry of a space-time prism on a road network and give an algorithm to compute and visualize space-time prisms. For experiments and illustration, we have implemented this algorithm in MATHEMATICA. Furthermore, we study the alibi query, which asks whether two moving objects could have possibly met or not. This comes down to deciding if the chains of space-time prisms produced by these moving objects intersect. We give an efficient algorithm to answer the alibi query for moving objects on a road network. This algorithm also determines where and when two moving objects may have met. Copyright Taylor & Francis Numéro de notice : A2009-381 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810802097485 En ligne : https://doi.org/10.1080/13658810802097485 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30011 [article]

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Street-based topological representations and analyses for predicting traffic flow in GIS / Bin Jiang in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1119 - 1137 Titre : Street-based topological representations and analyses for predicting traffic flow in GIS Type de document : Article/Communication Auteurs : Bin Jiang, Auteur ; C. Liu, Auteur Année de publication : 2009 Article en page(s) : pp 1119 - 1137 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] analyse spatiale [Termes IGN] axe médian [Termes IGN] découverte de connaissances [Termes IGN] Hong-Kong [Termes IGN] modèle de simulation [Termes IGN] relation topologique [Termes IGN] système d'information géographique [Termes IGN] trafic routier Résumé : (Auteur) It is well received in the space syntax community that traffic flow is significantly correlated to a morphological property of streets, which are represented by axial lines, forming a so called axial map. The correlation coefficient (R 2) approaches 0.8 and even a higher value according to the space syntax literature. In this paper, we study the same issue using the Hong Kong street network and the Hong Kong Annual Average Daily Traffic datasets, and find surprisingly that street-based topological representations (or street-street topologies) tend to be better representations than the axial map. In other words, vehicle flow is correlated to a morphological property of streets better than that of axial lines. Based on the finding, we suggest the street-based topological representations as an alternative GIS representation, and the topological analyses as a new analytical means for geographic knowledge discovery. Numéro de notice : A2009-382 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810701690448 En ligne : https://doi.org/10.1080/13658810701690448 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30012 [article]

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Semantic web services-based process planning for earth science applications / P. Yue in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1139 - 1163 Titre : Semantic web services-based process planning for earth science applications Type de document : Article/Communication Auteurs : P. Yue, Auteur ; W. Yang, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 1139 - 1163 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] datation [Termes IGN] implémentation (informatique) [Termes IGN] intelligence artificielle [Termes IGN] modélisation [Termes IGN] ontologie [Termes IGN] processus [Termes IGN] service web géographique [Termes IGN] service web sémantique Résumé : (Auteur) In a Web service-based distributed environment, individual services must be chained together dynamically to solve a complex real world problem. The Semantic Web Service has shown promise for automatic chaining of Web services. This paper addresses semi-automatic geospatial service chaining through Semantic Web Services-based process planning. Process planning includes three phases: process modeling, process model instantiation and workflow execution. Ontologies and Artificial Intelligence (AI) planning methods are employed in process planning to help a user dynamically create an executable workflow for earth science applications. In particular, the approach was implemented in a common data and service environment enabled by interoperable standards from OGC and W3C. A case study of the chaining process for wildfire prediction illustrates the applicability of this approach. Copyright Taylor & Francis Numéro de notice : A2009-383 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810802032680 En ligne : https://doi.org/10.1080/13658810802032680 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30013 [article]

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A new methodology for measuring coastline recession using buffering and non-linear least squares estimation / J. Heo in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1165 - 1177 Titre : A new methodology for measuring coastline recession using buffering and non-linear least squares estimation Type de document : Article/Communication Auteurs : J. Heo, Auteur ; J.H. Kim, Auteur ; J.W. Kim, Auteur Année de publication : 2009 Article en page(s) : pp 1165 - 1177 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] analyse comparative [Termes IGN] création de zone intermédiaire [Termes IGN] érosion côtière [Termes IGN] ligne de base [Termes IGN] littoral [Termes IGN] méthode des moindres carrés [Termes IGN] segmentation dynamique [Termes IGN] variabilité Résumé : (Auteur) Coastline recession is one of the best indicators of coastal erosion. Three methods for computing coastline recession - the baseline approach, the dynamic segmentation approach and the area-based approach - have been used, each of which has one or more drawbacks. To overcome these problems, a new methodology for measuring coastline recession is proposed, using buffering and non-linear least squares estimation. The proposed method was compared with the three existing methods with respect to two simulated cases and two real coastlines. Test results confirmed that the new method is more reliable than the three other methods, all of which are susceptible to variability of recession, scale, number of line segments, length of coastlines and direction of the baseline. The proposed method, incorporating two physically meaningful values - magnitude and variability of coastline recession according to the mean and standard deviation of coastline offsets, respectively - presents itself as an effective alternative method of assessing coastline recession. Copyright Taylor & Francis Numéro de notice : A2009-384 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810802035642 En ligne : https://doi.org/10.1080/13658810802035642 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30014 [article]

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Address databases for national SDI: Comparing the novel data grid approach to data harvesting and federated databases / Serena Coetzee in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1179 - 1209 Titre : Address databases for national SDI: Comparing the novel data grid approach to data harvesting and federated databases Type de document : Article/Communication Auteurs : Serena Coetzee, Auteur ; J. Bishop, Auteur Année de publication : 2009 Article en page(s) : pp 1179 - 1209 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] acquisition de données [Termes IGN] Afrique du sud (état) [Termes IGN] analyse comparative [Termes IGN] base de données d'adresses [Termes IGN] infrastructure nationale des données localisées [Termes IGN] serveur de données localisées [Termes IGN] système d'information géographique Résumé : (Auteur) The original purpose of addresses was to enable the correct and unambiguous delivery of postal mail. The advent of computers and more specifically geographic information systems (GIS) opened up a whole new range of possibilities for the use of addresses, such as routing and vehicle navigation, spatial demographic analysis, geo-marketing, and service placement and delivery. Such functionality requires a database which can store and access spatial data effectively. In this paper we present address databases and justify the need for national address databases. We describe models used for national address databases, and present our evaluation framework for an address database at a national level within the context of a spatial data infrastructure (SDI). The models of data harvesting, federated databases and data grids are analyzed and evaluated according to our novel framework, and we show that the data grid model has some unique features that make it attractive for a national address database in an environment where centralized control and/or coordination is difficult or undesirable. Copyright Taylor & Francis Numéro de notice : A2009-385 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810802084806 En ligne : https://doi.org/10.1080/13658810802084806 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30015 [article]

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Evaluating the effects of land-use development policies on ex-urban forest cover: an integrated agent-based GIS approach / D. Robinson in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1211 - 1232 Titre : Evaluating the effects of land-use development policies on ex-urban forest cover: an integrated agent-based GIS approach Type de document : Article/Communication Auteurs : D. Robinson, Auteur ; Daniel G. Brown, Auteur Année de publication : 2009 Article en page(s) : pp 1211 - 1232 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] aménagement du territoire [Termes IGN] couvert végétal [Termes IGN] environnement [Termes IGN] forêt [Termes IGN] Michigan (Etats-Unis) [Termes IGN] système d'information géographique [Termes IGN] système multi-agents [Termes IGN] utilisation du sol Résumé : (Auteur) We use a GIS-based agent-based model (ABM), named dynamic ecological exurban development (DEED), with spatial data in hypothetical scenarios to evaluate the individual and interacting effects of lot-size zoning and municipal land-acquisition strategies on possible forest-cover outcomes in Scio Township, a municipality in Southeastern Michigan. Agent types, characteristics, behavioural methods, and landscape perceptions (i.e. landscape aesthetics) are empirically informed using survey data, spatial analyses, and a USDA methodology for mapping landscape aesthetic quality. Results from our scenario experiments computationally verified literature that show large lot-size zoning policies lead to greater sprawl, and large lot-size zoning policies can lead to increased forest cover, although we found this effect to be small relative to municipal land acquisition. The return on land acquisition for forest conservation was strongly affected by the location strategy used to select parcels for conservation. Furthermore, the location strategy for forest conservation land acquisition was more effective at increasing aggregate forest levels than the independent zoning policies, the quantity of area acquired for forest conservation, and any combination of the two. The results using an integrated GIS and ABM framework for evaluating land-use development policies on forest cover provide additional insight into how these types of policies may act out over time and what aspects of the policies were more influential towards the goal of maximising forest cover. Copyright Taylor & Francis Numéro de notice : A2009-386 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article DOI : 10.1080/13658810802344101 En ligne : https://doi.org/10.1080/13658810802344101 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30016 [article]

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GIS, multi-criteria and multi-factor spatial analysis for the probability assessment of the existence of illegal landfills / G. Biotto in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1233 - 1244 Titre : GIS, multi-criteria and multi-factor spatial analysis for the probability assessment of the existence of illegal landfills Type de document : Article/Communication Auteurs : G. Biotto, Auteur ; S. Silvestri, Auteur ; L. Gobbo, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 1233 - 1244 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse multicritère [Termes IGN] analyse spatiale [Termes IGN] contamination [Termes IGN] décharge [Termes IGN] droit [Termes IGN] protection de l'environnement [Termes IGN] risque environnemental [Termes IGN] système d'information géographique [Termes IGN] télédétection spatiale [Termes IGN] Venise Résumé : (Auteur) This work deals with the identification of potentially contaminated areas using remote sensing, geographic information systems (GIS) and multi-criteria spatial analysis. The identification of unknown illegal landfills is a crucial environmental problem in all developed and developing countries, where a large number of illegal waste deposits exist as a result of fast, and relatively unregulated, industrial growth over the past century. The criteria used to perform the spatial analysis are here selected by considering the characteristics which are 'desirable' for an illegal waste disposal site, chiefly related to the existence of roads for easy access and to a low population density which facilitates unnoticed dumping of illegal waste materials. A large dataset describing known legal and illegal landfills and the context of their location (population, road network, etc.) was used to perform a spatial statistical analysis to select factors and criteria allowing for the identification of the known waste deposits. The final result is a map describing the likelihood of an illegal waste deposit to be located at any arbitrary location. Such a probability map is then used together with remote sensing techniques to narrow down the set of possibly contaminated sites (Silvestri and Omri, 2008), which are candidates for further analyses and field investigations. The importance of the integration of GIS and remote sensing is highlighted and represents a key instrument for environmental management and for the spatially-distributed characterization of possible uncontrolled landfill sites. Copyright Taylor & Francis Numéro de notice : A2009-387 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810802112128 En ligne : https://doi.org/10.1080/13658810802112128 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30017 [article]

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St-DMQL: a semantic trajectory data mining query language / Vania Bogorny in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1245 - 1276 Titre : St-DMQL: a semantic trajectory data mining query language Type de document : Article/Communication Auteurs : Vania Bogorny, Auteur ; Bart Kuijpers, Auteur ; L. Alvares, Auteur Année de publication : 2009 Article en page(s) : pp 1245 - 1276 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Langages informatiques [Termes IGN] attribut sémantique [Termes IGN] découverte de connaissances [Termes IGN] données localisées [Termes IGN] exploration de données géographiques [Termes IGN] langage de programmation [Termes IGN] langage de requête [Termes IGN] navigation [Termes IGN] objet mobile [Termes IGN] reconstruction d'itinéraire ou de trajectoire [Termes IGN] requête spatiotemporelle Résumé : (Auteur) Mobile devices are becoming very popular in recent years, and large amounts of trajectory data are generated by these devices. Trajectories left behind cars, humans, birds or other objects are a new kind of data which can be very useful in the decision making process in several application domains. These data, however, are normally available as sample points, and therefore have very little or no semantics. The analysis and knowledge extraction from trajectory sample points is very difficult from the user's point of view, and there is an emerging need for new data models, manipulation techniques, and tools to extract meaningful patterns from these data. In this paper we propose a new methodology for knowledge discovery from trajectories. We propose through a semantic trajectory data mining query language several functionalities to select, preprocess, and transform trajectory sample points into semantic trajectories at higher abstraction levels, in order to allow the user to extract meaningful, understandable, and useful patterns from trajectories. We claim that meaningful patterns can only be extracted from trajectories if the background geographical information is considered. Therefore we build the proposed methodology considering both moving object data and geographic information. The proposed language has been implemented in a toolkit in order to provide a first software prototype for trajectory knowledge discovery. Copyright Taylor & Francis Numéro de notice : A2009-388 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810802231449 En ligne : https://doi.org/10.1080/13658810802231449 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30018 [article]

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Effects of Lidar post-spacing and DEM resolution to mean slope estimation / T. Edwin in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1277 - 1295 Titre : Effects of Lidar post-spacing and DEM resolution to mean slope estimation Type de document : Article/Communication Auteurs : T. Edwin, Auteur ; M.E. Hodgson, Auteur Année de publication : 2009 Article en page(s) : pp 1277 - 1295 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] analyse de sensibilité [Termes IGN] bassin hydrographique [Termes IGN] Caroline du Sud (Etats-Unis) [Termes IGN] densité des points [Termes IGN] données lidar [Termes IGN] estimation de précision [Termes IGN] modèle numérique de surface [Termes IGN] pente [Termes IGN] pouvoir de résolution géométrique Résumé : (Auteur) This paper examines the effect of scale (exhibited by spatial sampling) in modeling mean slope from lidar data using two representations of scale: lidar posting density (i.e. post-spacing) and DEM resolution (i.e. cell size). The study areas selected include six small (i.e. approximately 3 km2) urban drainage basins in Richland County, SC, USA, which share similar hydrologic characteristics. This research spatially sampled an airborne lidar dataset collected in 2000 at a 2 m nominal posting density to simulate lidar posting density at various post-spacings, from 2 m through 10 m. DEMs were created from the lidar observations at a corresponding cell size using spatial interpolation. Finally, using these DEMs, a sensitivity analysis between modeled terrain slope and lidar post-spacing was conducted. Results of the sensitivity analyses showed that the deviation between mean slope and modeled mean slope decreases with finer posting density and DEM resolution. The relationship of mean slope with varying cell sizes and post-spacing suggests a linear and a logarithmic function, respectively, for all study areas. More importantly, cell size has a greater effect on mean slope than lidar posting density. Implications of these results for lumped hydrologic modeling are then postulated. Copyright Taylor & Francis Numéro de notice : A2009-389 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810802344127 En ligne : https://doi.org/10.1080/13658810802344127 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30019 [article]

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A discrete global grid system based on the parallels plane projection / T. Ma in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1297 - 1313 Titre : A discrete global grid system based on the parallels plane projection Type de document : Article/Communication Auteurs : T. Ma, Auteur ; Y. Zhou, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 1297 - 1313 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] déformation géométrique [Termes IGN] ellipsoïde de révolution [Termes IGN] parallèle [Termes IGN] partitionnement par bloc [Termes IGN] projection équivalente Résumé : (Auteur) We developed a direct partitioning method to construct a seamless discrete global grid system (DGGS) with any resolution based on a two-dimensional projected plane and the earth ellipsoid. This DGGS is composed of congruent square grids over the projected plane and irregular ellipsoidal quadrilaterals on the ellipsoidal surface. A new equal area projection named the parallels plane (PP) projection derived from the expansion of the central meridian and parallels has been employed to perform the transformation between the planar squares and the corresponding ellipsoidal grids. The horizontal sides of the grids are parts of the parallel circles and the vertical sides are complex ellipsoidal curves, which can be obtained by the inverse expression of the PP projection. The partition strategies, transformation equations, geometric characteristics and distortions for this DGGS have been discussed. Our analysis proves that the DGGS is area-preserving while length distortions only occur on the vertical sides off the central meridian. Angular and length distortions positively correlate to the increase in latitudes and the spanning of longitudes away from a chosen central meridian. This direct partition only generates a small number of broken grids that can be treated individually. Copyright Taylor & Francis Numéro de notice : A2009-390 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/POSITIONNEMENT Nature : Article DOI : 10.1080/13658810802344150 En ligne : https://doi.org/10.1080/13658810802344150 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30020 [article]

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An indoor routing algorithm for the blind: development and comparison to a routing algorithm for the sighted / M. Swobodzinski in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1315 - 1343 Titre : An indoor routing algorithm for the blind: development and comparison to a routing algorithm for the sighted Type de document : Article/Communication Auteurs : M. Swobodzinski, Auteur ; Martin Raubal, Auteur Année de publication : 2009 Article en page(s) : pp 1315 - 1343 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] analyse comparative [Termes IGN] navigation [Termes IGN] personne malvoyante [Termes IGN] positionnement en intérieur [Termes IGN] prototype Résumé : (Auteur) This paper presents a prototypical implementation of a non-network-based indoor routing algorithm for the sighted and the blind. The spatial abilities of the visually impaired are discussed. Former approaches of outdoor navigation systems for the blind are analysed and deemed inappropriate for the purpose of modelling indoor navigation. The proposed routing algorithm for the blind calculates routes based on physical characteristics of travelling with a long cane. The algorithm distinguishes between clues, landmarks, obstacles, and hazards along the feasible paths and selects the optimal route by trading off distance and the number of landmarks and clues along a route. Subsequently, the routes for the blind are compared to routes calculated by the routing algorithm for the sighted. The paper asserts that the proposed indoor routing algorithm leads to more suitable routes for the blind. Copyright Taylor & Francis Numéro de notice : A2009-391 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1080/13658810802421115 En ligne : https://doi.org/10.1080/13658810802421115 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30021 [article]

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An overview on current free and open source desktop GIS developments / Stefan Steiniger in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1345 - 1370 Titre : An overview on current free and open source desktop GIS developments Type de document : Article/Communication Auteurs : Stefan Steiniger, Auteur ; Erwan Bocher, Auteur Année de publication : 2009 Article en page(s) : pp 1345 - 1370 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] fonctionnalité [Termes IGN] logiciel libre [Termes IGN] système d'information géographique Résumé : (Auteur) Over the past few years the world of free and open source geospatial software has experienced some major changes. For instance, the website FreeGIS.org currently lists 330 GIS-related projects. Besides the advent of new software projects and the growth of established projects, a new organisation known as the OSGeo Foundation has been established to offer a point of contact. This paper will give an overview on existing free and open source desktop GIS projects. To further the understanding of the open source software development, we give a brief explanation of associated terms and introduce the two most established software license types: the General Public License (GPL) and the Lesser General Public License (LGPL). After laying out the organisational structures, we describe the different desktop GIS software projects in terms of their main characteristics. Two main tables summarise information on the projects and functionality of the currently available software versions. Finally, the advantages and disadvantages of open source software, with an emphasis on research and teaching, are discussed. Copyright Taylor & Francis Numéro de notice : A2009-392 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810802634956 En ligne : https://doi.org/10.1080/13658810802634956 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30022 [article]

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