The analysis of the suitability of Commonly Used DEM data
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Abstract:
This paper selects five different sources of DEM data—— HydroSHEDS void-filled DEM, SRTM and ASTER GDEM and so on to analyze the quality of different DEM data under different geomorphologic shapes by choosing different geomorphological characteristics analysis method and comparing the simulated drainage networks with the real drainage networks. The result shows that the main problem with ASTER GDEM DEM data is data noise and the other two DEM data both have some fuzzy data. These data quality issues will all effect the accuracy of the data and the river network extracted from them. But in general the accuracy of these digital drainage networks extracted from the three DEM data all have high precision.
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