Quality assessment for drainage networks and watershed boundaries extraction from a digital elevation model (DEM)

Authors:
Julie Charleux-Demargne;Christian Puech
Affiliations:
Spatial Structures & Systems, Cemagref - Engref, 500 rue J.F. Breton, 34093 Montpellier Cedex 5, France;Spatial Structures & Systems, Cemagref - Engref, 500 rue J.F. Breton, 34093 Montpellier Cedex 5, France
Venue:
Proceedings of the 8th ACM international symposium on Advances in geographic information systems
Year:
2000

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Abstract

The use of DEMs in hydrology requires new quality control criteria for drainage analysis. This paper presents an operational and quantitative method of controlling the quality of drainage networks and watershed boundaries extracted from a grid DEM with the D8 flow routing approach. This method enables us to quantify the grid bias induced by the D8 algorithm on the extracted objects and to optimize a DEM-reengineering technique.