[GRASS-dev] Re: another r.resamp.interp bug report

Michael Barton michael.barton at asu.edu
Wed Mar 19 01:26:44 EDT 2008

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
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