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Formalizing natural-language spatial relations between linear objects with topological and metric properties / Jingsi Xu in International journal of geographical information science IJGIS, vol 21 n° 3-4 (march - april 2007)
[article]
Titre : Formalizing natural-language spatial relations between linear objects with topological and metric properties Type de document : Article/Communication Auteurs : Jingsi Xu, Auteur Année de publication : 2007 Article en page(s) : pp 377 - 395 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] ArcGIS
[Termes IGN] caractérisation
[Termes IGN] espace métrique
[Termes IGN] espace topologique
[Termes IGN] formalisation
[Termes IGN] interface utilisateur
[Termes IGN] langage naturel (informatique)
[Termes IGN] objet géographique linéaire
[Termes IGN] relation topologique
[Termes IGN] requête spatialeRésumé : (Auteur) People usually use qualitative terms to express spatial relations, while current geographic information systems (GISs) all use quantitative approaches to store spatial information. The abilities of current GISs to represent and query spatial information about geographic space are limited. Based on the result of a human-subject test of natural-language descriptions of spatial relations between linear geographic objects, this paper defines a series of quantitative indices that are related to natural-language spatial relation terms, and uses these indices to formalize the ambiguous natural-language representation with a decision-tree algorithm. The result indicates that using both topological indices and metric indices can formalize the natural-language spatial predicates better than using only topological indices. The rules extracted from the trees are used to characterize the spatial relations into qualitative description groups. Using these rules, a prototype of an intelligent natural-language interface for the ESRI software ArcGIS that can query spatial relations between two linear objects in natural English language is implemented using SNePS (the Semantic Network Processing System). Copyright Taylor & Francis Numéro de notice : A2007-117 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600894323 En ligne : https://doi.org/10.1080/13658810600894323 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28480
in International journal of geographical information science IJGIS > vol 21 n° 3-4 (march - april 2007) . - pp 377 - 395[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-07021 RAB Revue Centre de documentation En réserve L003 Disponible 079-07022 RAB Revue Centre de documentation En réserve L003 Disponible A system of types and operators for handling vague spatial objects / A. Dilo in International journal of geographical information science IJGIS, vol 21 n° 3-4 (march - april 2007)
[article]
Titre : A system of types and operators for handling vague spatial objects Type de document : Article/Communication Auteurs : A. Dilo, Auteur ; A. De By Rolf, Auteur ; Alfred Stein, Auteur Année de publication : 2007 Article en page(s) : pp 397 - 426 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] imprécision des données
[Termes IGN] manipulation de données
[Termes IGN] modèle conceptuel de données localisées
[Termes IGN] objet géographique
[Termes IGN] relation topologique
[Termes IGN] sous ensemble flouRésumé : (Auteur) Vagueness is often present in spatial phenomena. Representing and analysing vague spatial phenomena requires vague objects and operators, whereas current GIS and spatial databases can only handle crisp objects. This paper provides mathematical definitions for vague object types and operators. The object types that we propose are a set of simple types, a set of general types, and vague partitions. The simple types represent identifiable objects of a simple structure, i.e. not divisible into components. They are vague points, vague lines, and vague regions. The general types represent classes of simple type objects. They are vague multipoint, vague multiline, and vague multiregion. General types assure closure under set operators. Simple and general types are defined as fuzzy sets in ?2 satisfying specific properties that are expressed in terms of topological notions. These properties assure that set membership values change mostly gradually, allowing stepwise jumps. The type vague partition is a collection of vague multiregions that might intersect each other only at their transition boundaries. It allows for a soft classification of space. All types allow for both a finite and an infinite number of transition levels. They include crisp objects as special cases. We consider a standard set of operators on crisp objects and define them for vague objects. We provide definitions for operators returning spatial types. They are regularized fuzzy set operators: union, intersection, and difference; two operators from topology: boundary and frontier; and two operators on vague partitions: overlay and fusion. Other spatial operators, topological predicates and metric operators, are introduced giving their intuition and example definitions. All these operators include crisp operators as special cases. Types and operators provided in this paper form a model for a spatial data system that can handle vague information. The paper is illustrated with an application of vague objects in coastal erosion. Copyright Taylor & Francis Numéro de notice : A2007-118 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810601037096 En ligne : https://doi.org/10.1080/13658810601037096 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28481
in International journal of geographical information science IJGIS > vol 21 n° 3-4 (march - april 2007) . - pp 397 - 426[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-07021 RAB Revue Centre de documentation En réserve L003 Disponible 079-07022 RAB Revue Centre de documentation En réserve L003 Disponible An experiment using a circular neighborhood to calculate slope gradient from a DEM / X. Shi in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 2 (February 2007)
[article]
Titre : An experiment using a circular neighborhood to calculate slope gradient from a DEM Type de document : Article/Communication Auteurs : X. Shi, Auteur ; A - Xing Zhu, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 143 - 154 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] classification par maximum de vraisemblance
[Termes IGN] données matricielles
[Termes IGN] gradient de pente
[Termes IGN] modèle numérique de surface
[Termes IGN] pente
[Termes IGN] relation topologique
[Termes IGN] relief
[Termes IGN] voisinage (relation topologique)Résumé : (Auteur) The traditional 3 X 3 cell neighbourhood used in a focal operation on a raster layer has a square shape that results in a dimensional neighbourhood of which the orientation is eventually arbitrary to the physical features represented. This paper presents an experiment using a circular neighbourhood to calculate slope gradient. Comparisons of the results from a circular neighbourhood with the results from some traditional methods show that (a) for a smooth surface, the result from a circular neighbourhood is more accurate than that from a square neighbourhood, (b) a circular neighbourhood is generally more sensitive to noise in the input DEM than a square neighbourhood, and (c) in a validation using field measurements, the circular neighbourhood performs better than the square neighbourhood when the ratio of user-specified neighbourhood size to cell size is high. Copyright ASPRS Numéro de notice : A2007-060 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.73.2.143 En ligne : https://doi.org/10.14358/PERS.73.2.143 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28425
in Photogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 2 (February 2007) . - pp 143 - 154[article]Database requirements for generalisation and multiple representations / Sébastien Mustière (01/01/2007)
Titre : Database requirements for generalisation and multiple representations Type de document : Chapitre/Contribution Auteurs : Sébastien Mustière , Auteur ; J.W.N. van Smaalen, Auteur Editeur : Amsterdam [Pays Bas] : Elsevier Année de publication : 01/01/2007 Importance : pp 113 - 136 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] approche hiérarchique
[Termes IGN] classe d'objets
[Termes IGN] MADS
[Termes IGN] modèle conceptuel de données localisées
[Termes IGN] modèle entité-association
[Termes IGN] modèle orienté objet
[Termes IGN] modèle topologique de données
[Termes IGN] objet géographique
[Termes IGN] représentation multiple
[Termes IGN] structure hiérarchique de donnéesRésumé : (Auteur) In this chapter, database requirements for generalisation and multiple representations are pre-sented. In particular the paper focuses on modelling requirements. Some general concepts in the field of databases are reviewed before elaboration on the modelling of geographical databases and discussion of the modelling of multiple representations for geographical databases. The chap-ter stresses the requirements for efficiently modelling data before and during the generalisation process. The reader will first encounter a description of the basic notions of model, schema and objects. Then geographic modelling and multiple representation will be described through the ex-ample of the MADS model. A discussion is presented on the different requirements for modelling multiple representations (1) during the generalisation process, or (2) to store the generalisation result, or (3) to perform the integration of independent databases. Then the meaning and role of topology, composite objects and hierarchies will be emphasised in the requirements for generalisation, with aggregation taken as an important example to illustrate this process. Numéro de notice : H2007-002 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : GEOMATIQUE/INFORMATIQUE Nature : Chapître / contribution Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65894 Efficient transmission of vector data over the Internet / B. Yang in International journal of geographical information science IJGIS, vol 21 n° 1-2 (january 2007)
[article]
Titre : Efficient transmission of vector data over the Internet Type de document : Article/Communication Auteurs : B. Yang, Auteur ; Ross S. Purves, Auteur ; Robert Weibel, Auteur Année de publication : 2007 Article en page(s) : pp 215 - 237 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Produits informatiques
[Termes IGN] architecture client-serveur
[Termes IGN] cohérence des données
[Termes IGN] diffusion de données
[Termes IGN] données vectorielles
[Termes IGN] logiciel de réseau
[Termes IGN] protocole IP
[Termes IGN] protocole TCP
[Termes IGN] qualité des données
[Termes IGN] relation topologique
[Termes IGN] serveur de données localiséesRésumé : (Auteur) This paper proposes and implements a new methodology for progressive transmission of vector lines and polygons over the Internet. The methodology generates continuous vector data through constrained remove operations of vertices on the server side, maintains consistent topology via a set of constraint rules, and restores original vector data through a reconstruction operator on the client side. The prototype system was implemented to investigate the performance of the methodology in terms of the preservation of consistent topology, transmission time, and qualities of the resulting visualizations. The method is shown to be scalable to large data sets, to produce graphically acceptable results and to maintain topology. Copyright Taylor & Francis Numéro de notice : A2007-033 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600894281 En ligne : https://doi.org/10.1080/13658810600894281 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28399
in International journal of geographical information science IJGIS > vol 21 n° 1-2 (january 2007) . - pp 215 - 237[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-07011 RAB Revue Centre de documentation En réserve L003 Disponible 079-07012 RAB Revue Centre de documentation En réserve L003 Disponible Etude sur la généralisation automatique des carrefours routiers complexes / Jérémy Renard (2007)PermalinkMetric details of topological line-line relations / K.A. Nedas in International journal of geographical information science IJGIS, vol 21 n° 1-2 (january 2007)PermalinkRadial topology algorithm: a new approach for deriving 2.5D GIS data models / U. Lenk in Geoinformatica, vol 10 n° 4 (December 2006)PermalinkFIG core cadastral domain model version 1.0: distributed cadastral systems / C. Lemmen in GIM international, vol 20 n° 11 (November 2006)PermalinkComputing 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)PermalinkA complete classification of topological relations using the 9-intersection method / S. Li in International journal of geographical information science IJGIS, vol 20 n° 6 (july 2006)PermalinkLa lasergrammetrie appliquée à l'auscultation des ouvrages d'art / B. Chazaly in XYZ, n° 107 (juin - août 2006)PermalinkL'importance de la modélisation géométrique pour les SIG 3D : exemple du développement d'un modèle topologique 3D pour une application géologique / Jacynthe Pouliot in Revue internationale de géomatique, vol 16 n° 1 (mars – mai 2006)PermalinkPermalinkCristage: A 3D GIS with a logical crystallographic layer to enable complex analyses / Benoit Poupeau (2006)PermalinkMise en place d'un outil de contrôle de saisie des données vectorielles avec GIS Data Reviewer / N. Rakotobe (2006)PermalinkResults of experiments on automated matching of networks at different scales / Sébastien Mustière (2006)PermalinkA change detection model based on neighborhood correlation image analysis and decision tree classification / J. Im in Remote sensing of environment, vol 99 n° 3 (30/11/2005)PermalinkA combinatorial data model for representing topological relations among 3D geographical features in micro-spatial environments / J. Lee in International journal of geographical information science IJGIS, vol 19 n° 10 (november 2005)PermalinkQuery processing in spatial databases containing obstacles / Jun Zhang in International journal of geographical information science IJGIS, vol 19 n° 10 (november 2005)PermalinkVariable-scale topological data structures suitable for progressive data transfer: the gap-face tree and gap-edge forest / Peter J. M. Van Oosterom in Cartography and Geographic Information Science, vol 32 n° 4 (October 2005)PermalinkHow to get 3D for the price of 2D: topology and consistency of 3D urban GIS / G. Groger in Geoinformatica, vol 9 n° 2 (June - August 2005)PermalinkNeural network model for standard PCA and its variants applied to remote sensing / S. Chitroub in International Journal of Remote Sensing IJRS, vol 26 n° 10 (May 2005)PermalinkLa Géodatabase sous ArcGIS, des fondements conceptuels à l'implémentation logicielle / F. Pirot in Géomatique expert, n° 41- 42 (01/03/2005)PermalinkCodage, adaptation et comparaison d'agorithmes de squelettisation d'une surface sur le SIG LAMPS2 / Christophe Mangeat (2005)Permalink