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Conflation optimized by least squares to maintain geographic shapes / Guillaume Touya in ISPRS International journal of geo-information, vol 2 n° 3 (September 2013)  

Public [article]  inISPRS International journal of geo-information > vol 2 n° 3 (September 2013) . - pp 621 - 644 Titre : Conflation optimized by least squares to maintain geographic shapes Type de document : Article/Communication Auteurs : Guillaume Touya , Auteur ; Adeline Coupé, Auteur ; Jérémie Le Jollec, Auteur ; Olivier Dorie, Auteur ; Frank Fuchs , Auteur Année de publication : 2013 Article en page(s) : pp 621 - 644 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] appariement automatique [Termes IGN] conflation par moindres carrés [Termes IGN] parcelle cadastrale [Termes IGN] polygone [Termes IGN] programmation par contraintes [Termes IGN] utilisation du sol Résumé : (auteur) Recent technologies allowed a major growth of geographical datasets with different levels of detail, different point of views, and different specifications, but on the same geographical extent. These datasets need to be integrated in order to benefit from their diversity. Conflation is one of the solutions to provide integration. Conflation aims at combining data that represent same entities from several datasets, into a richer new dataset. This paper proposes a framework that provides a geometrical conflation that preserves the characteristic shapes of geographic data. The framework is based on least squares adjustment, inspired from least squares based generalization techniques. It does not require very precise pre-matching, which is interesting as automatic matching remains a challenging task. Several constraints are proposed to preserve different kind of shape and relations between features, while conflating data. The framework is applied to a real land use parcels conflation problem with excellent results. The least squares based conflation is evaluated, notably with comparisons with existing techniques like rubber sheeting. The paper also describes how the framework can be extended to other geometrical optimization problems. Numéro de notice : A2013-790 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3390/ijgi2030621 En ligne : http://dx.doi.org/10.3390/ijgi2030621 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80107 [article]