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Applications of remote sensing and geographic information systems for urban land-cover change studies in Mongolia / D. Amarsaikhan in Geocarto international, vol 24 n° 4 (August - September 2009)  

Public [article]  inGeocarto international > vol 24 n° 4 (August - September 2009) . - pp 257 - 271 Titre : Applications of remote sensing and geographic information systems for urban land-cover change studies in Mongolia Type de document : Article/Communication Auteurs : D. Amarsaikhan, Auteur ; H. Blotevogel, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 257 - 271 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse diachronique [Termes IGN] changement d'occupation du sol [Termes IGN] classificateur paramétrique [Termes IGN] détection de changement [Termes IGN] fusion d'images [Termes IGN] image multitemporelle [Termes IGN] milieu urbain [Termes IGN] Mongolie [Termes IGN] occupation du sol [Termes IGN] système d'information géographique Résumé : (Auteur) The aim of this study is to compare the changes that occurred in the main urban land-cover classes of Ulaanbaatar city, Mongolia, during a centralized economy with those that occurred during a market economy and to describe the socio-economic reasons for the changes. For this purpose, multi-temporal remote sensing and geographical information system (GIS) data sets, as well as census data, are used. To extract the reliable urban land-cover information from the selected remotely sensed data sets, a refined parametric classification algorithm that uses spatial thresholds defined from local and contextual knowledge is constructed. Before applying the classification decision rule, some image fusion techniques are applied to the selected remotely sensed data sets to define the most efficient fusion method for training sample selection and for defining local and contextual knowledge. Overall, the study indicates that during the centralized economy significant changes occurred in a ger area of the city, whereas during the market economy the changes occurred in all areas. Copyright Taylor & Francis Numéro de notice : A2009-305 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040802556173 Date de publication en ligne : 23/07/2009 En ligne : https://doi.org/10.1080/10106040802556173 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29935 [article]

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