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« Measuring Hydrology Error on Compressed Terrain | Main | The Ridge-River Network »

Hydrology-Aware Constrained Delaunay Triangulation

By admin | March 16, 2008

TIN

A new data structure for simplifying terrain that captures hydrology significant features using a constrained Delaunay triangulation. This constrained triangulation preserves the hydrology by using irregular-sized, non-overlapping planes to model regions that flow in a uniform direction. Constrained edges are associated with drainage and ridge networks that incorporate physically-based structure into the model without significant overhead. This allows better compression ratios then standard Triangulated Irregular Networks with higher accuracy. In particular, hydrology significant error is reduced. Standard error metrics such as root mean squared (RMS) and maximum error fail to capture whether a reconstructed terrain accurately captures the hydrology. A hydrology error metric is used to verify our results based on the potential energy required for the reconstructed drainage to flow on the original terrain.

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Topics: Research |

11 Responses to “Hydrology-Aware Constrained Delaunay Triangulation”

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