Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/13682
Title: Terrain reconstruction from contours by skeleton construction
Authors: Thibault, D
Gold, CM
Keywords: Contour lines
Delaunay/Vovonoi digrams
Generalization
Skeleton
Terrain modeling
Issue Date: 2000
Source: Geoinformatica, 2000, v. 4, no. 4, p. 349-373 How to cite?
Journal: GeoInformatica 
Abstract: Generating terrain models from contour input is still an important process. Most methods have been unsatisfactory, as they either do not preserve the form of minor ridges and valleys, or else they are poor at modeling slopes. A method is described here, based on curve extraction and generalization techniques, that is guaranteed to preserve the topological relationships between curve segments. The skeleton, or Medial Axis Transform, can be extracted from the Voronoi diagram of a well-sampled contour map and used to extract additional points that eliminate cases of "flat triangles" in a triangulation. Elevation estimates may be made at these points. Based on this approach it is possible to make reasonable estimates of slopes for terrain models, and to extract meaningful intermediate points for triangulated irregular networks (TINs).
URI: http://hdl.handle.net/10397/13682
ISSN: 1384-6175
DOI: 10.1023/A:1026509828354
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