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Knowledge discovery from area-class resource maps: capturing prototype effects / F. Qi in Cartography and Geographic Information Science, vol 35 n° 4 (October 2008)  

Public [article]  inCartography and Geographic Information Science > vol 35 n° 4 (October 2008) . - pp 223 - 237 Titre : Knowledge discovery from area-class resource maps: capturing prototype effects Type de document : Article/Communication Auteurs : F. Qi, Auteur ; A - Xing Zhu, Auteur ; Tao Pei, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 223 - 237 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] classification à base de connaissances [Termes IGN] exploration de données [Termes IGN] extraction de données [Termes IGN] objet géographique [Termes IGN] outil de découverte de connaissances Résumé : (Auteur) This paper presents a knowledge discovery approach to extracting knowledge from area-class resource maps. Prototype theory forms the basis of the approach which consists of two major components: (1) a scheme for organizing knowledge used in categorizing geographic entities which allows for the modeling of indeterminate boundaries and non-uniform memberships within categories; and (2) a data mining method using the Expectation Maximization (EM) algorithm for extracting such knowledge from area-class maps. A case study on knowledge discovery from a soil map demonstrates the details of the approach. The study shows that knowledge for classifying geographic entities with indeterminate boundaries is embedded in area-class maps and can be extracted through data mining; and that continuous spatial variation of geographic entities can be better modeled if the knowledge discovery process retains knowledge of within-class variations as well as transitions between classes. Copyright CaGISociety Numéro de notice : A2008-437 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304008786140533 En ligne : https://doi.org/10.1559/152304008786140533 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29506 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-08041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Simulating complex adaptative geographic systems: a geographically aware intelligent agent approach / W. Tang in Cartography and Geographic Information Science, vol 35 n° 4 (October 2008)  

Public [article]  inCartography and Geographic Information Science > vol 35 n° 4 (October 2008) . - pp 239 - 263 Titre : Simulating complex adaptative geographic systems: a geographically aware intelligent agent approach Type de document : Article/Communication Auteurs : W. Tang, Auteur Année de publication : 2008 Article en page(s) : pp 239 - 263 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] agent (intelligence artificielle) [Termes IGN] apprentissage automatique [Termes IGN] classe d'objets [Termes IGN] classification à base de connaissances [Termes IGN] conception orientée objet [Termes IGN] modèle de simulation [Termes IGN] système d'information géographique [Termes IGN] système multi-agents Résumé : (Auteur) The objective of this paper is to present a spatially explicit agent-based simulation framework with a supporting software package to explore complex adaptive geographic systems. This framework is particularly suitable for modeling entities that are contextually aware, knowledge driven, and adaptive because it represents them as geographically aware intelligent agents. Fundamental advances in the explicit representation of contextual information, knowledge structures, and learning processes are needed for modeling intelligent agents situated within geographic systems. The representation of these agents requires the integration of agent-based models, machine learning, and GIS. Existing software packages for agent-based modeling, however, often provide insufficient support for this integration. The agent-based simulation package presented here is specifically designed to achieve such integration by assisting the development of agent-based models from the simulation framework. Object-oriented modeling techniques were used to implement this simulation package, which includes four modules: simulation, visualization, learning, and geoprocessing. In particular, the learning and geoprocessing modules facilitate the representation of adaptive behavior in agents within spatially explicit environments. The utility of the agent-based simulation package is illustrated using two simulation models: one of adaptive elk behavior and another of pedestrian movement. The successful design of the simulation models suggests that the modeling framework with the supporting software package is well suited to the resolution of complex adaptive geographic problems. Copyright CaGISociety Numéro de notice : A2008-438 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1559/152304008786140551 En ligne : https://doi.org/10.1559/152304008786140551 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29507 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-08041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

An assessment of the effects of cell size on AGNPS modeling of watershed runoff / S.S. Wu in Cartography and Geographic Information Science, vol 35 n° 4 (October 2008)  

Public [article]  inCartography and Geographic Information Science > vol 35 n° 4 (October 2008) . - pp 265 - 278 Titre : An assessment of the effects of cell size on AGNPS modeling of watershed runoff Type de document : Article/Communication Auteurs : S.S. Wu, Auteur ; E. Lynn Usery, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 265 - 278 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] agriculture [Termes IGN] analyse comparative [Termes IGN] analyse de données [Termes IGN] analyse de groupement [Termes IGN] bassin hydrographique [Termes IGN] modélisation spatiale [Termes IGN] ruissellement Résumé : (Auteur) This study investigates the changes in simulated watershed runoff from the Agricultural NonPoint Source (AGNPS) pollution model as a function of model input cell size resolution for eight different cell sizes (30 m, 60 m, 120 m, 210 m, 240 m, 480 m, 960 m, and 1920 m) for the Little River Watershed (Georgia, USA). Overland cell runoff (area-weighted cell runoff), total runoff volume, clustering statistics, and hot spot patterns were examined for the different cell sizes and trends identified. Total runoff volumes decreased with increasing cell size. Using data sets of 210-m cell size or smaller in conjunction with a representative watershed boundary allows one to model the runoff volumes within 0.2 percent accuracy. The runoff clustering statistics decrease with increasing cell size; a cell size of 960 m or smaller is necessary to indicate significant high-runoff clustering. Runoff hot spot areas have a decreasing trend with increasing cell size; a cell size of 240 m or smaller is required to detect important hot spots. Conclusions regarding cell size effects on runoff estimation cannot be applied to local watershed areas due to the inconsistent changes of runoff volume with cell size; but, optimal cells sizes for clustering and hot spot analyses are applicable to local watershed areas due to the consistent trends. Copyright CaGISociety Numéro de notice : A2008-439 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1559/152304008786140542 En ligne : https://doi.org/10.1559/152304008786140542 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29508 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-08041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Interoperable Internet mapping: an open source approach / X. Yao in Cartography and Geographic Information Science, vol 35 n° 4 (October 2008)  

Public [article]  inCartography and Geographic Information Science > vol 35 n° 4 (October 2008) . - pp 279 - 293 Titre : Interoperable Internet mapping: an open source approach Type de document : Article/Communication Auteurs : X. Yao, Auteur ; L.. Zou, Auteur Année de publication : 2008 Article en page(s) : pp 279 - 293 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] cartographie par internet [Termes IGN] internet [Termes IGN] interopérabilité [Termes IGN] logiciel libre [Termes IGN] service web géographique [Termes IGN] système d'information géographique [Termes IGN] Web Feature Service Résumé : (Auteur) The development of geographic information systems (GIS) is now being accompanied by an increasing popularity of Internet GIS mapping services. This study concerns two important issues with Internet GIS interoperability and Open source resources. Centering on the interplay of these two issues, we provide a systematic overview of techniques that have been used to deliver Internet GIS mapping and the relevance of the two issues with regard to these techniques. We then present a standard-and-open-source-based framework for Internet GIS mapping services to achieve data interoperability and high visual quality. The framework employs the Web Feature Service (WFS) to handle vector data and raster data. The Geography Markup Language (GML) standard is used for interoperable data storage and management. The Scalable Vector Graphic (SVG) standard is used to visualize GML data in web browsers. Two preliminary prototypes have been developed to demonstrate the capabilities of the framework. We conclude that using standard-based solutions is an important and viable direction of interoperable Internet GIS services. Advances in standardization and technology have significant implications for Internet GIS mapping. There are many powerful open sources tools which, when coupled with open standards, may be used to develop high-quality online GIS services. Importantly, these solutions require no investment in software, yet achieve excellent interoperability and visualization quality; they are excellent alternative approaches to Internet mapping. Copyright CaGISociety Numéro de notice : A2008-440 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1559/152304008786140560 En ligne : https://doi.org/10.1559/152304008786140560 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29509 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-08041	RAB	Revue	Centre de documentation	En réserve L003	Disponible