[GRASS5] [bug #3826] (grass) two r.resamp.rst issues

[Michael Barton]

Hamish,

We've run into that here too. One of my RA's did a test of interpolating to
a higher resolution using r.resamp.rst and the more complicated procedure of
generating a large number of points from a raster map, and then
interpolating from the points to a higher resolution.

r.resamp.rst is faster and more straightforward. BUT (a VERY big but), it
behaves exactly as you describe. It simply turns out a map that looks just
like the original map is subdivided into more grid cells, without any
interpolation. This makes the module essentially useless.

Michael
__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution and Social Change
Arizona State University
Tempe, AZ 85287-2402

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton



> From: Request Tracker <grass-bugs at intevation.de>
> Reply-To: Request Tracker <grass-bugs at intevation.de>
> Date: Sat, 12 Nov 2005 13:37:05 +0100 (CET)
> To: <grass5 at grass.itc.it>
> Subject: [GRASS5] [bug #3826] (grass) two r.resamp.rst issues
> 
> this bug's URL: http://intevation.de/rt/webrt?serial_num=3826
> -------------------------------------------------------------------------
> 
> Subject: two r.resamp.rst issues
> 
> If you run r.resamp.rst at a resolution other that that of the input map, the
> output elev map is not created at the specified ew_res= and ns_res=
> resolution.
> A warning is given that you are doing so, but it doesn't mention why that
> might be bad. Interestingly the output map is actually written at the target
> resolution, but it contains the data resolution from the original map. (target
> was 50m, original was 100m)
> 
> If the input map is in another mapset (map at othermapset) then it gives an error
> that the input map can't be found. (happens when it tries to copy the color
> table I think) and exits with an error. (but processing is already done so
> output map is ok, just without a colortable)
> 
> 
> Hamish
> 
> 
> ps - I've tidied up the module's code and strings a bit in CVS, so cvs update
> before fixing...
> 
> 
> -------------------------------------------- Managed by Request Tracker
> 
> 
>