[GRASS-dev] in trunk png/cairo d.vect overwrites previous images?

Moritz Lennert mlennert at club.worldonline.be
Tue Jan 31 04:36:01 EST 2012

On 31/01/12 00:20, Patrice Dumas wrote:
> Hello,
> I ask here first before because this seems a bit weird that nobody else
> reported it, but maybe I missed a bug report or something changed in grass
> 7?
> When doing more than one d.vect after a d.mon start=png (or cairo) the
> last one overwrite completly the previous one.  With wx0 or 6.4 the
> vector was on top but did not remove the previous vector.
> Should I report that or is it known?

This behaviour is controlled by the GRASS_PNG_READ environment variable. 
If you set it to TRUE, then GRASS will lay the new d.vect on top of the 
already drawn vectors, otherwise it overwrites with the new. See 


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