Thanks both for the help, Glynn and Hamish. Setting GRASS_TRUECOLOR to TRUE did it. Once that was changed, the colors came out identical to the QGIS display. Which I'm very happy about!
The file was originally FCELL, so I also tried switching it to CELL. This didn't make a change to the color scaling that I could see, although I was looking at it on files aggregated at the level of provinces (in Laos), so if there was a subtle change in color smoothing I likely would not have seen it. Hamish, regarding your question about QGIS importing GRASS color tables - I'm afraid I don't know what GMT .cpt files are, so can't respond to that part, but it does successfully import GRASS color tables as long as the cell values are all non-negative. When there are negative values, that seems to break down, and it only gives colors for the positive values, leaving the negatives as white (so in my case, it worked well for maps of '% forest cover', but did not work for maps of '% change in forest cover'). I had less luck getting QGIS to use GRASS color tables for vectors, but I didn't follow that up very far. Thanks again for the help! Tim Glynn Clements wrote: > > > Tim Holland wrote: > >> I am trying to generate PNG files of a few different maps using r.colors, >> d.rast, and the PNG driver. >> >> The images I get from this process end up being colored slightly >> differently >> than when the equivalent images are generated in QGIS. It is far more >> convenient to use the PNG driver right in GRASS (because I can set a >> script >> running and print out many images at once), but I prefer the color >> results I >> get with QGIS. > > Does it help if you do: > > export GRASS_TRUECOLOR=TRUE > > before starting the PNG driver? > > The PNG driver defaults to generating 256-colour images, using a fixed > 6x6x6 colour-cube. > > -- > Glynn Clements <[email protected]> > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > > -- View this message in context: http://n2.nabble.com/r-colors-generates-different-colors-than-QGIS-plugin-when-same-rules-used-tp3558680p3564911.html Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
