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dtarb / TauDEM

Terrain Analysis Using Digital Elevation Models (TauDEM) software for hydrologic terrain analysis and channel network extraction.
http://hydrology.usu.edu/taudem
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Slope #170

Closed jvalenza closed 6 years ago

jvalenza commented 6 years ago

New to TauDEM, and I just had a quick question about the slope file that is used for flow direction. In what units are the d8Slope values? I am hoping to use the values in the d8Slope file (as calculated for my AOI) as the hillslope angle values, (assuming that the two are equivalent), but I need to know what units the d8Slope values are in before I can convert to degrees. When I open the file in ArcMap the range in values is 0 to 452400... and I'm not sure how to interpret this.

Thanks! J

dtarb commented 6 years ago

Sorry to be slow in replying. Slope values are rise over run, or since it is downhill, the vertical drop over horizontal distance. This is equivalent to the tan of the angle.