On Mar 18, 2008, at 10:09 PM, Helena Mitasova wrote:
On Mar 19, 2008, at 12:49 AM, Michael Barton wrote:
On Mar 18, 2008, at 9:39 PM, Helena Mitasova wrote:
Michael - I have added an example from the book at the bottom of
this page - please try it and let me know whether it works.
http://skagit.meas.ncsu.edu/~helena/grasswork/grassbookdat07/
ncexternal/demo.txt
Please keep in mind that r.resample* is for reinterpolation of
continuous data to a different resolution not for interpolation
from scattered data (see the equations in the Appendix on what it
does) (r.surf.idw is designed for scattered data input in raster
format). You should convert your points from raster to vector
points and use the v.surf* modules to interpolate.
I hope this helps and let me know if the examples don't work
Thanks Helena. The issue that I ran into today (embarrassingly
with my class) is that of the v.surf.*modules, v.surf.bspline does
not work (I reported this sometime back), v.surf.rst crashes and
brings down the entire GUI (this is new), leaving only v.surf.idw
as the only functional interpolation routine in todays SVN trunk.
nothing has changed in rst except for some message standardization
4 months ago and build cleanup (makefile) by glynn 6 months ago.
I am wondering whether something in GUI has changed that conflicts
with what rst is doing (or rst is doing something that the modified
GUI does not like ) - perhaps there is some computation before
G_parser is called - would that crash it?
It is 1am now so I need to go but I can look at it tomorrow if I
can get some hints on what the problem may be.
I never run it from GUI so it might have been there for a while.
Helena
Thanks again Helena. In fact, I haven't need to do interpolation for
at least 6 months and so it might well have been there for awhile.
I'm doing further testing too.
Michael
Michael
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