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Cartographic line generalization with waterlines and medial-axes / A.H.J. Christensen in Cartography and Geographic Information Science, vol 26 n° 1 (January 1999)  

Public [article]  inCartography and Geographic Information Science > vol 26 n° 1 (January 1999) . - pp 19 - 32 Titre : Cartographic line generalization with waterlines and medial-axes Type de document : Article/Communication Auteurs : A.H.J. Christensen, Auteur Année de publication : 1999 Article en page(s) : pp 19 - 32 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] agrégation de détails [Termes IGN] élimination de points [Termes IGN] généralisation cartographique automatisée [Termes IGN] lissage de courbe [Termes IGN] objet géographique linéaire [Termes IGN] trait de côte [Vedettes matières IGN] Généralisation Résumé : (Auteur) A line generalization solution is presented based on the operations known as waterlining and medialaxis transformation. Although the solution is of general application, this report focuses on shorelines. The method is shown to preserve the general shape of a line through very broad scale changes ; it also makes it possible to perform feature aggregation and elimination, where needed. Each scale change is proven to depend on the maximum distance spanned by the waterlining operation, which distance can be equated to the quantity known as in the generalization literature. The challenges encountered in the development of the generalization procedure are discussed ; these challenges are less on the side of line simplification and more in the aggregation of features. Solutions are presented for broadening isthmus, linkages to streams and rivers, and the collapsing of straits into double and coincident lines. Particular shoreline configurations are shown to lead to ambiguities in feature aggregation and elimination that require user's input in order to be resolved. Intermediate results are found to replicate those submitted 39 years ago by Julian Perkal in his proposal for an objective generalization. Numéro de notice : A1999-169 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304099782424893 En ligne : https://www.tandfonline.com/doi/abs/10.1559/152304099782424893 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26367 [article]

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