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Geoweb services for sharing modelling results in biodiversity networks / K.D. Fook in Transactions in GIS, vol 13 n° 4 (August 2009)  

Public [article]  inTransactions in GIS > vol 13 n° 4 (August 2009) . - pp 379 - 399 Titre : Geoweb services for sharing modelling results in biodiversity networks Type de document : Article/Communication Auteurs : K.D. Fook, Auteur ; A. Viera Montero, Auteur ; G. Camara, Auteur ; M. Casanova, Auteur ; S. Amaral, Auteur Année de publication : 2009 Article en page(s) : pp 379 - 399 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] biodiversité [Termes IGN] coopération [Termes IGN] géomatique web [Termes IGN] modèle de simulation [Termes IGN] partage de données localisées [Termes IGN] prototype [Termes IGN] service web géographique Résumé : (Auteur) Biodiversity researchers in different institutions deal with predictive models for species distribution. These models are useful for biodiversity conservation policies. Species distribution modelling tools need large datasets from different sources and use many algorithms. To improve biodiversity science, scientists need to share models, data and results, and should be able to reproduce experiments from others. This article presents a geoweb service architecture that supports sharing of modelling results and enables researchers to perform new modelling experiments. We show the feasibility of the proposed architecture by developing a set of prototype services, called Web Biodiversity Collaborative Modelling Services – WBCMS. They provide a set of geospatial web services that support the sharing of species distribution models. The article includes an example of a model instance that explains the WBCMS prototype. We believe that WBCMS shows how to set up a cooperative research network on biodiversity research. Copyright Blackwell Publishing Numéro de notice : A2009-529 Affiliation des auteurs : non IGN Thématique : BIODIVERSITE/GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2009.01170.x En ligne : https://doi.org/10.1111/j.1467-9671.2009.01170.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30158 [article]

Yet another map algebra / J. Cerveira Cordeiro in Geoinformatica, vol 13 n° 2 (June 2009)  

Public [article]  inGeoinformatica > vol 13 n° 2 (June 2009) . - pp 183 - 202 Titre : Yet another map algebra Type de document : Article/Communication Auteurs : J. Cerveira Cordeiro, Auteur ; G. Camara, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 183 - 202 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Langages informatiques [Termes IGN] analyse spatiale [Termes IGN] automate [Termes IGN] langage de modélisation [Termes IGN] Map Algebra [Termes IGN] modèle cartographique [Termes IGN] voisinage (relation topologique) Résumé : (Auteur) This paper describes features of a language approach for map algebra based on the use of algebraic expressions that satisfy a concise formalism. To be consistent with formal approaches such as geoalgebra and image algebra, the proposed algebraic expressions are suitable not only for the usual modeling of layers but also to describe variable neighborhoods and zones. As a compromise between language and implementation issues we present an implementation strategy based on the theory of automata. The result is an efficient way of implementing map algebra that simplifies its use on environmental and dynamic models without going too far from its well-known paradigm. Copyright Springer Numéro de notice : A2009-075 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1007/s10707-008-0045-4 En ligne : https://doi.org/10.1007/s10707-008-0045-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29705 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-09021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Global and local spatial indices of urban segregation / F.F. Feitosa in International journal of geographical information science IJGIS, vol 21 n° 3-4 (march - april 2007)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 21 n° 3-4 (march - april 2007) . - pp 299 - 323 Titre : Global and local spatial indices of urban segregation Type de document : Article/Communication Auteurs : F.F. Feitosa, Auteur ; G. Camara, Auteur ; A.M. Monteiro, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 299 - 323 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] Brésil [Termes IGN] données socio-économiques [Termes IGN] indicateur spatial Résumé : (Auteur) Urban segregation has received increasing attention in the literature due to the negative impacts that it has on urban populations. Indices of urban segregation are useful instruments for understanding the problem as well as for setting up public policies. The usefulness of spatial segregation indices depends on their ability to account for the spatial arrangement of population and to show how segregation varies across the city. This paper proposes global spatial indices of segregation that capture interaction among population groups at different scales. We also decompose the global indices to obtain local spatial indices of segregation, which enable visualization and exploration of segregation patterns. We propose the use of statistical tests to determine the significance of the indices. The proposed indices are illustrated using an artificial dataset and a case study of socio-economic segregation in São José dos Campos (SP, Brazil). Copyright Taylor & Francis Numéro de notice : A2007-113 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810600911903 En ligne : https://doi.org/10.1080/13658810600911903 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28476 [article]

Exemplaires(2)

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

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)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 7 (august 2006) . - pp 797 - 811 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 [article]

Exemplaires(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

Bridging ontologies and conceptual schemas in geographic information integration / Frederico Fonseca in Geoinformatica, vol 7 n° 4 (December 2003)  

Public [article]  inGeoinformatica > vol 7 n° 4 (December 2003) . - pp 355 - 378 Titre : Bridging ontologies and conceptual schemas in geographic information integration Type de document : Article/Communication Auteurs : Frederico Fonseca, Auteur ; C. Davis, Auteur ; G. Camara, Auteur Année de publication : 2003 Article en page(s) : pp 355 - 378 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] modèle conceptuel de données [Termes IGN] modélisation [Termes IGN] ontologie [Termes IGN] schéma conceptuel de données [Termes IGN] système d'information géographique Résumé : (Auteur) Integration of geographic information has increased in importance because of new possibilities arising from the interconnected world and the increasing availability of geographic information. Ontologies support the creation of conceptual models and help with information integration. In this paper, we propose a way to link the formal representation of semantics (i.e., ontotogies) to conceptual schemas describing information stored in databases. The main result is a formal framework that explains a mapping between a spatial ontology and a geographic conceptual schema. The mapping of ontologies to conceptual schemas is made using three different levels of abstraction: formal, domain, and application levels. At the formal level, highly abstract concepts are used to express the schema and the ontologies. At the domain level, the schema is regarded as an instance of a generic data model. At the application level, we focus on the particular case of geographic applications. We also discuss the influence of ontologies in both the traditional and geographic systems development methodologies, with an emphasis on the conceptual design phase. Numéro de notice : A2003-389 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1023/A:1025573406389 En ligne : https://doi.org/10.1023/A:1025573406389 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26469 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-03041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Tabu search heuristic for point-feature cartographic label placement / M. Yamamoto in Geoinformatica, vol 6 n° 1 (March - May 2002)  

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