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mlt / PIHM

This is a modified version of PIHM that retains some previous versions and may have new bugs introduced.
https://github.com/mlt/PIHM/wiki
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Better watershed delineation tool is needed #3

Open mlt opened 12 years ago

mlt commented 12 years ago

Current implementation is based on TauDEM precursors and uses non-GPL code from ESRI. This stuff needs to be eliminated ASAP!!!

Notable shortcoming is the inability to set watershed outlet. This leads to sometimes erroneous boundaries stretching far beyond the real outlet.

Due to maintenance reasons, it is better to move forward. There are no quality watershed delineation tools available in QGIS :( Possible alternatives are

  1. Set up a GRASS GIS database within PIHM GIS project to perform delineation using r.water.outlet and friends
  2. Have wrapper around modern TauDEM (requires MPICH2)

First approach is the easiest to implement, is the most portable, and is almost hassle free. Example gist. GUI wrappers are needed.

Why no one wrote QGIS wrappers using PyQt for TauDEM yet?

mlt commented 12 years ago

Another versatile option is to make use of sextante.

mlt commented 12 years ago

Care should be taken not to break code that expects certain fields (e.g., TO_NODE & FROM_NODE) and other constraints.