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Using hachures to construct a 3D doline model automatically / Nai Yang in Cartographica, vol 50 n° 2 (Summer 2015)  

Public [article]  inCartographica > vol 50 n° 2 (Summer 2015) . - pp 86 - 93 Titre : Using hachures to construct a 3D doline model automatically Type de document : Article/Communication Auteurs : Nai Yang, Auteur ; Lin Wan, Auteur ; G. Zheng, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 86 - 93 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Rédaction cartographique [Termes IGN] effondrement de terrain [Termes IGN] grotte [Termes IGN] hachure [Termes IGN] représentation cartographique 3D Résumé : (auteur) All types of relief features are usually represented by a unified digital terrain model on 3D topographic maps. Few studies have considered the differences in relief characteristics and terrain complexity. Hachures are often used to construct the relief symbols on 2D topographic maps, but they are less used on 3D topographic maps. This article uses hachures to construct a 3D doline model and divides them into three types: outlines, ridge lines, and break lines. We present the extraction method for doline outlines, consider the rules of visual perception under different illumination conditions, and study the mathematical models for representing the morphological characteristics of the doline with regard to the following aspects: width, arrangement density, and grey value of hachures. Finally, we introduce a process for 3D modelling of dolines on the basis of the above discussion. Experimental results indicate that the proposed model achieves a good 3D visual representation of dolines. Furthermore, the proposed model can also be used as a reference for the creation of 3D models of other negative relief features. Numéro de notice : A2015-273 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/cart.50.2.2793 En ligne : http://www.utpjournals.press/doi/full/10.3138/cart.50.2.2793 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76386 [article]

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