[GRASS-user] GRASS pygrass - composite

Pierric de Laborie pierric.delaborie at gmail.com
Wed Feb 11 01:02:45 PST 2015


Hello,

I am using Grass 7.0 through Python and Pygrass (from outside Grass without
starting it) on Linux (Debian GNU/Linux 7.6 (wheezy)) .

I don't understand why Grass seems to get stuck on the following Python
command :

*r.composite(red="B4",green="B3",blue="B2",output="mycomposite",quiet=QUIET,overwrite=OVR)*

Here is the information message coming from Grass :

*Creating color table for output raster map...*
*0..6..12..18..25..31..37..43..50..56..62..68..75..81..87..93..100*
*Writing raster map <mycomposite>...*
*0..*

I checked the process and memory usage and apparently Grass uses about 100%
of the CPU time and only uses half of the memory available.

Would there be a way to have more debug / warning information to understand
what Grass is doing?

Thanks
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