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Uncovering the statistical and spatial characteristics of fine toposcale DEM error / Juha Oksanen in International journal of geographical information science IJGIS, vol 20 n° 4 (april 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 4 (april 2006) . - pp 345 - 369 Titre : Uncovering the statistical and spatial characteristics of fine toposcale DEM error Type de document : Article/Communication Auteurs : Juha Oksanen, Auteur ; Tapani Sarjakoski, Auteur Année de publication : 2006 Article en page(s) : pp 345 - 369 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] contour [Termes IGN] données laser [Termes IGN] erreur aléatoire [Termes IGN] erreur systématique [Termes IGN] Finlande [Termes IGN] modèle d'erreur [Termes IGN] modèle numérique de surface [Termes IGN] propagation d'erreur Résumé : (Auteur) The aim of our study was to characterize statistical and spatial details of the errors in a fine toposcale DEM derived by contour data. The fine toposcale DEMs are typically represented in a 5-50 m grid and used in the application scale 1:10000-1:50000. The errors were determined by using high-quality reference data covering the entire study area from an airborne laser scanner. The work was motivated because of the essential role played by the correct characterization of DEM error in error-propagation studies. The results showed that the spatial autocorrelation of the fine toposcale DEM error was the result of a complex combination of random and systematic-like components, and its appropriate modelling by geostatistical methods is problematic because of the small extent of the areas in which the assumption of stationarity is valid. In addition, describing the shape of the DEM error distribution was impossible with a single parameter of dispersion. This was due to a large number of outliers, which suggests that more robust descriptors of the error should be used in addition to conventional error statistics. Numéro de notice : A2006-178 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810500433891 En ligne : https://doi.org/10.1080/13658810500433891 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27905 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06041	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06042	RAB	Revue	Centre de documentation	En réserve L003	Disponible

XML web service-based development model for Internet GIS applications / Y.S. Chang in International journal of geographical information science IJGIS, vol 20 n° 4 (april 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 4 (april 2006) . - pp 371 - 399 Titre : XML web service-based development model for Internet GIS applications Type de document : Article/Communication Auteurs : Y.S. Chang, Auteur ; H.D. Park, Auteur Année de publication : 2006 Article en page(s) : pp 371 - 399 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] données hétérogènes [Termes IGN] format SVG [Termes IGN] GML [Termes IGN] intégration de données [Termes IGN] internet [Termes IGN] interopérabilité [Termes IGN] modèle conceptuel de données localisées [Termes IGN] service web géographique [Termes IGN] système d'information géographique [Termes IGN] XML Résumé : (Auteur) Most of the current Internet Geographic Information System (GIS) applications cannot be shared and are not interoperable because of their heterogeneous environments. With the growth of Internet GIS, many difficulties have occurred in integrating GIS components because of their diversity. The main objective of this study is to suggest a new development model for dynamic and interoperable Internet GIS applications. The model is based mainly on the dynamic integration of Internet GIS components by applying Extensible Markup Language (XML), XML Web Service, Geography Markup Language (GML), and Scalable Vector Graphics (SVG), etc. The relevant technologies of Internet GIS were reviewed thoroughly, and then a new model was designed. During the design of the new model, typical examples of GIS Web Service components were suggested, together with practical structures for applications using these components. Six examples of components and four types of applications were suggested, and they were experimentally implemented for model validation and improvement. The suggested model and components will enable easier and more rapid development of Internet GIS applications through the dynamic integration of distributed GIS components. Users will be able to avoid redundancy and consequently reduce both cost and time during each GIS project. Numéro de notice : A2006-179 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810600607857 En ligne : https://doi.org/10.1080/13658810600607857 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27906 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06041	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06042	RAB	Revue	Centre de documentation	En réserve L003	Disponible

An evolutionary algorithm for multicriteria path optimization problems / P. Mooney in International journal of geographical information science IJGIS, vol 20 n° 4 (april 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 4 (april 2006) . - pp 401 - 423 Titre : An evolutionary algorithm for multicriteria path optimization problems Type de document : Article/Communication Auteurs : P. Mooney, Auteur ; A. Winstanley, Auteur Année de publication : 2006 Article en page(s) : pp 401 - 423 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] algorithme évolutionniste [Termes IGN] analyse multicritère [Termes IGN] approximation [Termes IGN] implémentation (informatique) [Termes IGN] optimisation (mathématiques) [Termes IGN] pondération [Termes IGN] système d'information géographique Résumé : (Auteur) For many years researchers and decision makers (DMs) faced with multicriteria shortest path problems (MSPPs) have resorted to reductions to the classical shortest path problem (SPP) by means of weighted linear combinations of the criteria. Algorithmic and approximation schemes are available to solve MSPPs but these approaches often display complexities prohibitive to their implementation on real-world applications. This paper describes the development of an Evolutionary Algorithm (EA) approach to MSPPs on networks with multiple independent criteria. The EA approach is shown to sufficiently explore the underlying network space, generate large candidate path sets, and evolve high quality approximations to the optimal MSPP solution(s). Opportunities for early termination of the EA in time-critical applications are also offered. Among the issues for further work is the integration of the EA as a tool within a GIS for path optimization. Numéro de notice : A2006-180 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600607766 En ligne : https://doi.org/10.1080/13658810600607766 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27907 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06041	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06042	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Evaluating the usability of visualization methods in an exploratory geovisualization environment / E.L. Koua in International journal of geographical information science IJGIS, vol 20 n° 4 (april 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 4 (april 2006) . - pp 425 - 448 Titre : Evaluating the usability of visualization methods in an exploratory geovisualization environment Type de document : Article/Communication Auteurs : E.L. Koua, Auteur ; Alan M. MacEachren, Auteur ; Menno-Jan Kraak, Auteur Année de publication : 2006 Article en page(s) : pp 425 - 448 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Intelligence artificielle [Termes IGN] carte de Kohonen [Termes IGN] découverte de connaissances [Termes IGN] données socio-économiques [Termes IGN] exploration de données [Termes IGN] visualisation cartographique Résumé : (Auteur) The use of new representation forms and interactive means to visualize geospatial data requires an understanding of the impact of the visual tools used for data exploration and knowledge construction. Use and usability assessment of implemented methods and tools is an important part of our efforts to build this understanding. Based on an approach to combine visual and computational methods for knowledge discovery in large geospatial data, an integrated visualization-geocomputation environment has been developed based on the Self-Organizing Map (SOM), the map and the parallel coordinate plot. This environment allows patterns and attribute relationships to be explored. A use and usability assessment is conducted to evaluate the ability of each of these visual representations to meet user performance and satisfaction goals. In the test, different representations are compared while exploring a socio-demographic dataset. Numéro de notice : A2006-181 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600607550 En ligne : https://doi.org/10.1080/13658810600607550 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27908 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06041	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06042	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Global sensitivity analysis, GIS and multi-criteria evaluation for a sustainable planning of a hazardous waste disposal site in Spain / M. Gomez-Delgado in International journal of geographical information science IJGIS, vol 20 n° 4 (april 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 4 (april 2006) . - pp 449 - 466 Titre : Global sensitivity analysis, GIS and multi-criteria evaluation for a sustainable planning of a hazardous waste disposal site in Spain Type de document : Article/Communication Auteurs : M. Gomez-Delgado, Auteur ; S. Tarantola, Auteur Année de publication : 2006 Article en page(s) : pp 449 - 466 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] acquisition de données [Termes IGN] aménagement durable [Termes IGN] analyse de sensibilité [Termes IGN] analyse multicritère [Termes IGN] déchet [Termes IGN] développement durable [Termes IGN] Espagne [Termes IGN] évaluation des données [Termes IGN] risque environnemental [Termes IGN] système d'information géographique [Termes IGN] variance Résumé : (Auteur) A novel application of Sensitivity Analysis is presented. Useful applications of Global SA (GSA) already exist in the field of numerical modelling. In this paper, we explore the joint use of GSA, Geographical Information Systems (GIS) and Multi-Criteria Evaluation. In this preliminary case study, 11 factors have been used to find the best place to locate a hazardous waste landfill. Two variance-based methods (Sobol' and E-FAST) are used to compute sensitivity indices in order to identify the factors that determine the variance of the model output. The results show that only three factors jointly account for 97% of the output variance. This information is employed to make a simplification of the original model, retaining only these three influential factors. In addition, if the SA is carried out in a pilot area where the spatial properties are similar to those of the whole region, we can infer the results to the whole area. This procedure achieves the goal of the study with an optimized allocation of resources for GIS data acquisition. Numéro de notice : A2006-182 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600607709 En ligne : https://doi.org/10.1080/13658810600607709 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27909 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06041	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06042	RAB	Revue	Centre de documentation	En réserve L003	Disponible