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Title: Four-triangles adaptive algorithms for RTIN terrain meshes
Authors: Suárez, J. P. 
Plaza, A. 
UNESCO Clasification: 120601 Construcción de algoritmos
Keywords: Longest edge
Terrain modeling
Issue Date: 2009
Journal: Mathematical and Computer Modelling 
Abstract: We present a refinement and coarsening algorithm for the adaptive representation of Right-Triangulated Irregular Network (RTIN) meshes. The refinement algorithm is very simple and proceeds uniformly or locally in triangle meshes. The coarsening algorithm decreases mesh complexity by reducing unnecessary data points in the mesh after a given error criterion is applied. We describe the most important features of the algorithms and give a brief numerical study on the propagation associated with the adaptive scheme used for the refinement algorithm. We also present a comparison with a commercial tool for mesh simplification, Rational Reducer, showing that our coarsening algorithm offers better results in terms of accuracy of the generated meshes.
ISSN: 0895-7177
DOI: 10.1016/j.mcm.2008.02.012
Source: Mathematical and Computer Modelling [ISSN 0895-7177], v. 49, p. 1012-1020
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