Descripteur
Documents disponibles dans cette catégorie (949)
![](./images/expand_all.gif)
![](./images/collapse_all.gif)
Etendre la recherche sur niveau(x) vers le bas
Semantically correct 2.5D GIS data: the integration of a DTM and topographic vector data / A. Koch in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 1 (October 2006)
![]()
[article]
Titre : Semantically correct 2.5D GIS data: the integration of a DTM and topographic vector data Type de document : Article/Communication Auteurs : A. Koch, Auteur ; Christian Heipke, Auteur Année de publication : 2006 Article en page(s) : pp 23 - 32 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] données localisées 2D
[Termes IGN] intégration de données
[Termes IGN] modèle numérique de terrain
[Termes IGN] précision sémantique
[Termes IGN] qualité sémantique
[Termes IGN] Triangulated Irregular Network
[Termes IGN] triangulation de DelaunayRésumé : (Auteur) The most commonly used topographic vector data, the reference data of national geographic information systems (GIS) are currently two-dimensional. The topography is modelled by different objects which are represented by single points, lines and areas with additional attributes containing information, for instance on the function and size of the object. In contrast, a digital terrain model (DTM) in most cases is a 2.5D representation of the earth's surface. The integration of the two data sets leads to an augmentation of the dimension of the topographic objects. However, due to inconsistencies between the data the integration process may lead to semantically incorrect results. This paper presents a new approach for the integration of a DTM and 2D GIS vector data including the re-establishment of the semantic correctness of the integrated data set. The algorithm consists of two steps. In the first step the DTM and the topographic objects are integrated without considering the semantics of the objects. This geometric integration is based on a DTM TIN (triangular irregular network) computed using a constrained Delaunay triangulation. In the second step those objects which contain implicit height information are further utilized: object representations are formulated and the semantics of the objects are considered within an optimization process using equality and inequality constraints. The algorithm is based on an inequality constrained least squares adjustment formulated as the linear complementary problem (LCP). The algorithm results in an integrated semantically correct 2.5D GIS data set. Results are presented using simulated and real data. Lakes represented by horizontal planes with increasing terrain outside the lake and roads which are composed of several tilted planes were investigated. The algorithm shows satisfying results: the constraints are fulfilled and the visualization of the integrated data set corresponds to the human view of the topography. Copyright ISPRS Numéro de notice : A2006-439 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2006.07.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2006.07.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28163
in ISPRS Journal of photogrammetry and remote sensing > vol 61 n° 1 (October 2006) . - pp 23 - 32[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-06071 SL Revue Centre de documentation Revues en salle Disponible A snake-based approach for TIGER data conflation / W. Song in Cartography and Geographic Information Science, vol 33 n° 4 (October 2006)
![]()
[article]
Titre : A snake-based approach for TIGER data conflation Type de document : Article/Communication Auteurs : W. Song, Auteur ; L. Haithcoat, Auteur ; J.M. Keller, Auteur Année de publication : 2006 Article en page(s) : pp 287 - 298 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] axe médian
[Termes IGN] données vectorielles
[Termes IGN] fusion de données multisource
[Termes IGN] intégration de données
[Termes IGN] noeud
[Termes IGN] précision de localisation
[Termes IGN] réseau routier
[Termes IGN] route
[Termes IGN] Topologically Integrated Geographic Encoding and ReferencingRésumé : (Auteur) The TIGER (Topologically Integrated Geographic Encoding and Referencing) system has served the U.S. Census Bureau and other agencies' geographic needs successfully for two decades. Poor positional accuracy has however made it extremely difficult to integrate TIGER with advanced technologies and data sources such as GPS, high resolution imagery, and state/local GIS data. In this paper, a potential solution for conflation of TIGER road centerline data with other geospatial data is presented. The first two steps of the approach (feature matching and map alignment) remain the same as in traditional conflation. Following these steps, a third is added in which active contour models (snakes) are used to automatically move the vertices of TIGER roads to high-accuracy roads, rather than transferring attributes between the two datasets. This approach has benefits over traditional conflation methodology. It overcomes the problem of splitting vector road line segments, and it can be extended for vector imagery conflation as well. Thus, a variety of data sources (GIS, GPS, and Remote Sensing) could be used to improve TIGER data. Preliminary test results indicate that the three-step approach proposed in this paper performs very well. The positional accuracy of TIGER road centerline can be improved from an original 100 plus meters' RMS error to only 3 meters. Such an improvement can make TIGER data more useful for much broader application. Copyright CaGISociety Numéro de notice : A2006-589 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1559/152304006779500669 En ligne : https://doi.org/10.1559/152304006779500669 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28312
in Cartography and Geographic Information Science > vol 33 n° 4 (October 2006) . - pp 287 - 298[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 032-06041 RAB Revue Centre de documentation En réserve L003 Disponible Computing the fuzzy topological relations of spatial objects based on induced fuzzy topology / K. Liu in International journal of geographical information science IJGIS, vol 20 n° 8 (september 2006)
![]()
[article]
Titre : Computing the fuzzy topological relations of spatial objects based on induced fuzzy topology Type de document : Article/Communication Auteurs : K. Liu, Auteur ; Wei Shi, Auteur Année de publication : 2006 Article en page(s) : pp 857 - 883 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] logique floue
[Termes IGN] modèle topologique complet
[Termes IGN] objet géographique
[Termes IGN] relation topologique
[Termes IGN] topologieRésumé : (Auteur) For modeling the topological relations between spatial objects, the concepts of a bound on the intersection of the boundary and interior, and the boundary and exterior are defined in this paper based on the newly developed computational fuzzy topology. Furthermore, the qualitative measures for the intersections are specified based on the ?-cut induced fuzzy topology, which are (A???A)(x) Numéro de notice : A2006-348 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600711345 En ligne : https://doi.org/10.1080/13658810600711345 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28072
in International journal of geographical information science IJGIS > vol 20 n° 8 (september 2006) . - pp 857 - 883[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-06081 RAB Revue Centre de documentation En réserve L003 Disponible 079-06082 RAB Revue Centre de documentation En réserve L003 Disponible Multi-VMap: a multi-scale model for vector maps / R. Viana in Geoinformatica, vol 10 n° 3 (September - November 2006)
![]()
[article]
Titre : Multi-VMap: a multi-scale model for vector maps Type de document : Article/Communication Auteurs : R. Viana, Auteur ; P. Magillo, Auteur ; E. Puppo, Auteur ; P.A. Ramos, Auteur Année de publication : 2006 Article en page(s) : pp 359 - 394 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique
[Termes IGN] algorithme géométrique
[Termes IGN] analyse combinatoire (maths)
[Termes IGN] données multiéchelles
[Termes IGN] graphe
[Termes IGN] mise à jour automatique
[Termes IGN] représentation vectorielle
[Termes IGN] VMAPRésumé : (Auteur) Multi-VMap is a compact framework from which plane graphs representing geographic maps at different levels of detail can be extracted. Its main feature is that the scale of the extracted map can be variable through its domain, while each entity maintains consistent combinatorial relations with the rest of entities represented in the map. The model is based on a set of operators, called updates, which modify the level of detail in a small portion of a map. The set of updates is partially ordered and can therefore be represented as a Directed Acyclic Graph, which defines our multi-scale structure. An algorithm to extract a map at the required resolution is proposed, and a lower bound for the number of different maps which can be extracted from the model is given. The model supports map data processing operations (e.g., querying), as well as progressive and selective transmission of maps over a network. Copyright Springer Numéro de notice : A2006-530 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-006-9832-y En ligne : https://doi.org/10.1007/s10707-006-9832-y Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28253
in Geoinformatica > vol 10 n° 3 (September - November 2006) . - pp 359 - 394[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-06031 RAB Revue Centre de documentation En réserve L003 Disponible Efficient regionalization techniques for socio-economic geographical units using minimum spanning trees / Renato Martins Assuncao in International journal of geographical information science IJGIS, vol 20 n° 7 (august 2006)
![]()
[article]
Titre : Efficient regionalization techniques for socio-economic geographical units using minimum spanning trees Type de document : Article/Communication Auteurs : Renato Martins Assuncao, Auteur ; M.C. Neves, Auteur ; G. Camara, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 797 - 811 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] algorithme STA
[Termes IGN] arbre (mathématique)
[Termes IGN] données socio-économiques
[Termes IGN] graphe
[Termes IGN] objet géographique
[Termes IGN] optimisation (mathématiques)
[Termes IGN] régionalisation (segmentation)Résumé : (Auteur) Regionalization is a classification procedure applied to spatial objects with an areal representation, which groups them into homogeneous contiguous regions. This paper presents an efficient method for regionalization. The first step creates a connectivity graph that captures the neighbourhood relationship between the spatial objects. The cost of each edge in the graph is inversely proportional to the similarity between the regions it joins. We summarize the neighbourhood structure by a minimum spanning tree (MST), which is a connected tree with no circuits. We partition the MST by successive removal of edges that link dissimilar regions. The result is the division of the spatial objects into connected regions that have maximum internal homogeneity. Since the MST partitioning problem is NP-hard, we propose a heuristic to speed up the tree partitioning significantly. Our results show that our proposed method combines performance and quality, and it is a good alternative to other regionalization methods found in the literature. Copyright Taylor & Francis. Numéro de notice : A2006-295 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600665111 En ligne : https://doi.org/10.1080/13658810600665111 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28022
in International journal of geographical information science IJGIS > vol 20 n° 7 (august 2006) . - pp 797 - 811[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-06071 RAB Revue Centre de documentation En réserve L003 Disponible 079-06072 RAB Revue Centre de documentation En réserve L003 Disponible Error assessment in two lidar-derived TIN datasets / M.H. Peng in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 8 (August 2006)
PermalinkPopulation landscape: a geometric approach to studying spatial patterns of the US urban hierarchy / L. Mu in International journal of geographical information science IJGIS, vol 20 n° 6 (july 2006)
PermalinkComparaison d'organisations spatiales agricoles : le système ROSA / J.L. Metzger in Revue internationale de géomatique, vol 16 n° 2 (juin – août 2006)
PermalinkConception collaborative d'objets géographiques / Patrice Caron in Revue internationale de géomatique, vol 16 n° 2 (juin – août 2006)
PermalinkDeformation using agents for map generalization : application to the preservation of relationships between fields and objects / Julien Gaffuri (01/06/2006)
![]()
PermalinkParcours itinéraire méthodologique de diagnostic de territoire : exploration par un navigateur / Sylvie Lardon in Revue internationale de géomatique, vol 16 n° 2 (juin – août 2006)
PermalinkA quantitative description model for direction relations based on direction groups / Hongxiang Yan in Geoinformatica, vol 10 n° 2 (June - August 2006)
PermalinkPrincipes et mise en œuvre de PostGIS (2e partie) / D. Faivre in Géomatique expert, n° 50 (01/05/2006)
PermalinkA new algorithm for continuous area cartogram construction with triangulation of regions and restriction on bearing changes of edges / R. Inoue in Cartography and Geographic Information Science, vol 33 n° 2 (April 2006)
PermalinkLa modélisation de données océanographiques à l'aide du diagramme de Voronoï tridimensionnel / Hugo Ledoux in Revue internationale de géomatique, vol 16 n° 1 (mars – mai 2006)
PermalinkUtilizing Voronoi cells of location data streams for accurate computation of aggregate functions in sensor networks / M. Sharifzadeh in Geoinformatica, vol 10 n° 1 (March - May 2006)
PermalinkPermalinkPermalinkCalculs d'accessibilité, impact des spécifications du réseau routier sur les calculs d'accessibilité / Magali Di Salvo (2006)
PermalinkDétection et généralisation des échangeurs routiers dans une base de données cartographiques vectorielles / Nicolas Culson (2006)
PermalinkGeographic information science, 4th international conference, GIScience 2006, Münster, Germany, September 2006 / Martin Raubal (2006)
PermalinkPermalinkPermalinkQuantitative classification as a tool to show change in an urbanizing watershed / W.B. Clapham in International Journal of Remote Sensing IJRS, vol 26 n° 22 (November 2005)
PermalinkAn integrated TIN and Grid method for constructing multi-resolution digital terrain models / B. Yang in International journal of geographical information science IJGIS, vol 19 n° 10 (november 2005)
Permalink