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I have some questions about the drainage density map.
It is calculated as the ratio between the length of the network and the
catchment area upstream each pixel.
The input maps are:
1. the drainage directions
2. the total contributing area map (is this the tca or the ab map?)
3. the stream network map
In which units is the dd expressed?
The resulting map on a basin express the dd of each point, is the dd
value of the basin outlet the dd of the whole upstream basin or should I
make some elaborations to have the dd of the my basin?
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