[GRASS-dev] [GRASS GIS] #99: r.resamp.interp fails for bicubic and bilinear interpolation

GRASS GIS trac at osgeo.org
Tue Mar 18 14:39:25 EDT 2008

#99: r.resamp.interp fails for bicubic and bilinear interpolation
 Reporter:  cmbarton  |       Owner:  grass-dev at lists.osgeo.org
     Type:  defect    |      Status:  new                      
 Priority:  critical  |   Milestone:  6.3.0                    
Component:  default   |     Version:  unspecified              
 Keywords:            |  
 I just found out that r.resamp.interp fails for both bicubic and bilinear
 interpolation. It makes maps with all NAN values. I used the new NC data
 set and produced a set of random elevation points (raster and vector),
 then tried to use these in r.resamp.interp. The nearest neighbor routine
 worked, but the others did not. I tried the original raster point map and
 also tried one that I converted to a CELL map. Neither gave usable
 results. FWIW, I got the same result using r.bilinear.

 I'm having a very difficult time putting together a class on interpolation
 using GRASS today. v.surf.bspline does not work, 2 of the 3 methods in
 r.resamp.interp do not work. r.bilinear does not work. Pretty bad press.


Ticket URL: <http://trac.osgeo.org/grass/ticket/99>
GRASS GIS <http://grass.osgeo.org>
GRASS Geographic Information System (GRASS GIS) - http://grass.osgeo.org/

More information about the grass-dev mailing list