Coupling Terrain and Building Database Information for Ray-Tracing Applications
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2003
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In this paper a methodology for the combination and integration into a single data base of terrain and building data is presented -- This study is justified if ray-tracing techniques are to be used in propagation and channel modeling studies -- Usually terrain is available in grid or elevation form while building information is normally facet-oriented -- Ray-tracing (RT) techniques deal with flat facets and straight edges, if possible in triangular format -- To allow the use of RT on urban areas over irregular terrain a common format made up of facets and edges is therefore needed -- In this article, the procedure to accomplish this data homogeneity is presented -- It is assumed that terrain data is available in two formats: a) grid elevation and b) contour or iso-altitude lines -- Building data is assumed available in plant, polygonal planar contour form, a primitive and yet widely used format which is yet to be transformed into 3D entities -- The geometric modeling of joint terrain and building data is further difficuledt because union of surface objects (even after achieving a unified format) is undefined from the point of view of 3D boolean operations
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@Inproceedings{2003_Ruiz_Usage,
title={Usage of 2D region similarity for surface reconstrucion from planar samples. S.I.A.M.},
author={Ruiz, O. and Cadavid, C. and Granados, M. and Vasquez, E. and Pena, S.},
booktitle={Simposium on Industry-Applied Mathematics, Conference on Geometric Design and Computing },
address={Washington, USA},
year={2003},
}