Centre de documentation
scientifique

Dépouillements

Formal information modelling for standardisation in the spatial domain / Stephan Winter in International journal of geographical information science IJGIS, vol 17 n° 8 (december 2003)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 17 n° 8 (december 2003) . - pp 721 - 741 Titre : Formal information modelling for standardisation in the spatial domain Type de document : Article/Communication Auteurs : Stephan Winter, Auteur ; Silvia Nittel, Auteur Année de publication : 2003 Article en page(s) : pp 721 - 741 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] analyse comparative [Termes IGN] interface logicielle [Termes IGN] interopérabilité [Termes IGN] langage fonctionnel [Termes IGN] modèle orienté objet [Termes IGN] normalisation [Termes IGN] Open GIS Consortium [Termes IGN] spécification de processus [Termes IGN] système d'information géographique [Termes IGN] UML Résumé : (Auteur) This paper presents the results and experiences of applying a formal tool to writing specifications for software in the spatial domain. We take a specification from a standards organization to demonstrate the properties of this approach, and we compare our result with the semi-formal specification of the standards organization. The expected advantages formal semantics of specified interfaces, total abstraction from implementation, executable prototype, and extendable algebraic structure - can be verified. However negative experiences are reported also: pure abstract code turns out to appear overloaded and difficult to read (by humans). With this work we contribute to the foundations of standardisation efforts in the spatial domain, preserving an object oriented modeling approach. Numéro de notice : A2003-297 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810310001596067 En ligne : https://doi.org/10.1080/13658810310001596067 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22593 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-03081	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Automated map generalization with multiple operators: a simulated annealing approach / J. Mark Ware in International journal of geographical information science IJGIS, vol 17 n° 8 (december 2003)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 17 n° 8 (december 2003) . - pp 743 - 769 Titre : Automated map generalization with multiple operators: a simulated annealing approach Type de document : Article/Communication Auteurs : J. Mark Ware, Auteur ; Christopher B. Jones, Auteur ; N. Thomas, Auteur Année de publication : 2003 Article en page(s) : pp 743 - 769 Langues : Anglais (eng) Descripteur : [Termes IGN] algorithme du recuit simulé [Termes IGN] conflit d'espace [Termes IGN] généralisation cartographique automatisée [Termes IGN] généralisation géométrique (de visualisation) [Termes IGN] itération [Termes IGN] placement automatique des écritures [Termes IGN] placement automatique des signes conventionnels [Vedettes matières IGN] Généralisation Résumé : (Auteur) This paper explores the use of the stochastic optimization technique of simulated annealing for map generalization. An algorithm is presented that performs operations of displacement, size exaggeration, deletion and size reduction of multiple map objects in order to resolve graphic conflict resulting from map scale reduction. It adopts a trial position approach in which each of n discrete polygonal objects is assigned k candidate trial positions that represent the original, displaced, size exaggerated, deleted and size reduced states of the object. This gives rise to a possible kn distinct map configurations; the expectation is that some of these configurations will contain reduced levels of graphic conflict. Finding the configuration with least conflict by means of an exhaustive search is, however, not practical for realistic values of n and k. We show that evaluation of a subset of the configurations, using simulated annealing, can result in effective resolution of graphic conflict. Numéro de notice : A2003-298 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810310001596085 En ligne : https://doi.org/10.1080/13658810310001596085 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22594 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-03081	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Knowledge discovery from soil maps using inductive learning / F. Qi in International journal of geographical information science IJGIS, vol 17 n° 8 (december 2003)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 17 n° 8 (december 2003) . - pp 771 - 795 Titre : Knowledge discovery from soil maps using inductive learning Type de document : Article/Communication Auteurs : F. Qi, Auteur ; A - Xing Zhu, Auteur Année de publication : 2003 Article en page(s) : pp 771 - 795 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse comparative [Termes IGN] apprentissage dirigé [Termes IGN] arbre de décision [Termes IGN] carte pédologique [Termes IGN] cartographie géologique [Termes IGN] découverte de connaissances [Termes IGN] échantillonnage d'image [Termes IGN] filtrage du bruit [Termes IGN] histogramme [Termes IGN] intelligence artificielle [Termes IGN] réseau neuronal artificiel [Termes IGN] restauration d'image Résumé : (Auteur) This paper develops a knowledge discovery procedure for extracting knowledge of soil-landscape models from a soil map. It has broad relevance to knowledge discovery from other natural resource maps. The procedure consists of four major steps: data preparation, data preprocessing, pattern extraction, and knowledge consolidation. In order to recover true expert knowledge from the error-prone soil maps, our study pays specific attention to the reduction of representation noise in soil maps. The data preprocessing step has exhibited an important role in obtaining greater accuracy. A specific method for sampling pixels based on modes of environmental histograms has proven to be effective in terms of reducing noise and constructing representative sample sets. Three inductive learning algorithms, the See5 decision tree algorithm, Naïve Bayes, and artificial neural network, are investigated for a comparison concerning learning accuracy and result comprehensibility. See5 proves to be an accurate method and produces the most comprehensible results, which are consistent with the rules (expert knowledge) used in producing the soil map. The incorporation of spatial information into the knowledge discovery process is found not only to improve the accuracy of the extracted knowledge, but also to add to the explicitness and extensiveness of the extracted soil-landscape model. Numéro de notice : A2003-299 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810310001596049 En ligne : https://doi.org/10.1080/13658810310001596049 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22595 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-03081	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Comparison of polynomial models for land surface curvature calculation / J. Schmidt in International journal of geographical information science IJGIS, vol 17 n° 8 (december 2003)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 17 n° 8 (december 2003) . - pp 797 - 814 Titre : Comparison of polynomial models for land surface curvature calculation Type de document : Article/Communication Auteurs : J. Schmidt, Auteur ; I.S. Evans, Auteur ; J. Brinkmann, Auteur Année de publication : 2003 Article en page(s) : pp 797 - 814 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] courbure [Termes IGN] figuré du terrain [Termes IGN] géomorphologie [Termes IGN] modèle numérique de terrain [Termes IGN] pesanteur terrestre Résumé : (Auteur) Curvature is a fundamental surface property whose application, for example in geomorphology and hydrology, has long been recognised. Its measurement from Digital Terrain Models (DTMs) has received less attention than that of slope, and there is even disagreement about which definitions of curvature are most applicable. Here these problems are related to semantic problems in the definition of the land surface, and three distinct algorithms for the three main gravity-related components of curvature are compared for both artificial and real surfaces. Quadratic-based algorithms are shown to give more stable results. Higher-order local surfaces (e.g. partial quartic) can fit more complex landform features, but are reliable only for very accurate data. Numéro de notice : A2003-300 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810310001596058 En ligne : https://doi.org/10.1080/13658810310001596058 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22596 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-03081	RAB	Revue	Centre de documentation	En réserve L003	Disponible