W dniu 10.07.2010 02:31, Hamish pisze:
Maciek wrote:

For heterogenous input data I'd try the nn algorithm in
nnbathy, through r.surf.nnbathy 
(http://grass.osgeo.org/wiki/Addons#r.surf.nnbathy).

It is great for sparse points, but for contour lines + hydrological
modeling it is not the best. See nn valley staircase effect in
  http://grass.osgeo.org/wiki/Contour_lines_to_DEM

Interpolating from contour lines has always been a nightmare for me :). What is the best approach in your opinion?

Maciek

--
Maciej Sieczka
http://www.sieczka.org
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