A related issue -- I'd like to use r.external but I can't seem to get it to work.  I'm running wxPython for GRASS 6.4 (from the Osgeo4W installation).  r.external seems to work properly, but when I try to display the result, I get an error message telling me that GDALAllRegister can't be found.  Here, I've reproduced this in the spearfish60 dataset:

r.out.gdal input=elevation.10m output=elev_dem10.img format=HFA type=Float32
r.external input=elev_dem10.img output=elev_dem10_rext
d.rast map=elev_dem10_rext


The layer shows up in the layer manager as "raster (double-click to set properties)".  I double-click and the name changes to elev_dem10_r...@user1...

Then I try to Zoom to Layer, or click on the Display Map button and I get:

Execution fiailed: 'd.rast.exe map=elev_dem10_r...@user1 --q'
Details:
Error: Unable to locate symbol <GDALAllRegister>

(By the way, I've also encountered this error message trying to do r.mapcalc on a GRASS file imported using r.in.gdal.)

Has anyone encountered this error?  Is there a way to fix it?

Thanks,
Matt

Hamish wrote:
Tim Michelsen wrote:
  
There exist v.external and r.external to link to data which
hasn't been imported into GRASS.

But in order to save time and disk space I would like to
link to data sets from other locations:

How do I link to a raster and vector data in another
location presuming it has the same projection?
    

add the mapset as a symlink to the mapset in the other location,
then use the @othermapset notation.

(at your own risk)

Hamish



      

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Matthew Landis, Ph.D.
Research Analyst
ISciences, LLC
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