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Proceedings Paper

Terrain modeling with uncertainty for geographic information systems
Author(s): Miguel Angel Garcia
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Paper Abstract

This paper presents the application of a recently developed geometrical modeling technique to the representation of natural terrain for geographic information systems. The original method allows the approximation of 3D irregular triangular meshes with smooth parametric surfaces (Garcia, 1993). This method behaves rather similarly to traditional tensor-product schemes, such as NURBS, but operates upon irregular meshes of control points. The obtained surfaces can be locally modified through weighting factors associated with the control points. This paper proposes the use of those factors to represent geometrical uncertainty. The original method was extended afterwards (Garcia, 1994) allowing the interpolation of triangular meshes. The current paper reviews both techniques and introduces a unified model that integrates them into a single representational tool. The theoretical concepts are illustrated with several examples that include real terrain models.

Paper Details

Date Published: 17 August 1994
PDF: 8 pages
Proc. SPIE 2357, ISPRS Commission III Symposium: Spatial Information from Digital Photogrammetry and Computer Vision, (17 August 1994); doi: 10.1117/12.182853
Show Author Affiliations
Miguel Angel Garcia, Polytechnic Univ. of Catalonia and Spanish Council for Scientific Research (Spain)


Published in SPIE Proceedings Vol. 2357:
ISPRS Commission III Symposium: Spatial Information from Digital Photogrammetry and Computer Vision
Heinrich Ebner; Christian Heipke; Konrad Eder, Editor(s)

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