[GRASS-user] patching dems together

Hamish hamish_b at yahoo.com
Fri Jul 10 02:31:07 EDT 2009

stephen wrote:
> r.info
> any ideas,

 g.region rast=yourmap
 r.univar yourmap
 d.histogram yourmap

are other useful ways to see if there is really any data in the map,
even if the color map (r.colors) has somehow gone completely out of range
and 0-100% is all set to a single color.

unlike r.info which looks at the metadata, r.univar and r.stats etc look
at the current computational region, resampling if need be; reporting
all NULLs if the map is not in the current zoom.



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