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Flooding Triangulated Terrain

  • Yuanxin Liu
  • Jack Snoeyink

Abstract

We extend pit filling and basin hierarchy computation to TIN terrain models. These operations are relatively easy to implement in drainage computations based on networks (e.g., raster D8 or Voronoi dual) but robustness issues make them difficult to implement in an otherwise appealing model of water flow on a continuous surface such as a TIN. We suggest a consistent solution of the robustness issues, then augment the basin hierarchy graph with different functions for how basins fill and spill to simplify the watershed graph to the essentials. Our solutions can be tuned by choosing a small number of intuitive parameters to suit applications that require a data-dependent selection of basin hierarchies.

Keywords

Digital Elevation Model Local Channel Triangulate Irregular Network Digital Elevation Data Steep Descent Direction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Yuanxin Liu
    • 1
  • Jack Snoeyink
    • 1
  1. 1.Department of Computer ScienceUniversity of North CarolinaChapel HillUSA

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