Have you tried a different azimuth? Sometimes certain values can
cause features to look inverted for given terrain conditions.
Mark
On Jan 4, 2010, at 8:32 PM, Rich Shepard <rshep...@appl-ecosys.com>
wrote:
On Tue, 5 Jan 2010, Glynn Clements wrote:
Run r.slope.aspect on the interpolated map, and check for grid-like
artifacts.
Glynn,
Did this. Yes, there is a grid-like appearance to the resulting map.
How good is the underlying data? If it's noisy, it may need to be
filtered before interpolating.
How do I check for noisy data? I have all the basic information
about the
source data and derived maps.
Also: which version of GRASS are you using?
6.5svn.
Thanks,
Rich
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