Color tables
About
Color tables live in $GISBASE/etc/colors (see SVN)
Modules
- r.colors (r.colors manual in GRASS 7 has colors tables embedded as well as the GUI dialog)
- r.colors.stddev (samples)
- r.colors.out
- r3.colors (GRASS 7 only)
- r3.colors.out (GRASS 7 only)
- v.colors
- v.colors.out (GRASS 7 only)
Addons
- User contributed color rules in the GRASS Addons repository
- Convert from GMT color tables with r.cpt2grass
- Use r.colors.quantiles to create raster colors rules based on n-quantiles. It uses the R and the spgrass6 package.
- Use r.colors.out_sld to export GRASS raster colors rules in OGC SLD template v1.0.0 XML format for Geoserver and the ilk
- Use r.colors.out_vtk to export GRASS raster colors rules for use with VTK-based visualization software.
Repositories
- There was an online colormap repository with many fine GMT (and many others) gradients at http://soliton.vm.bytemark.co.uk/pub/cpt-city/.
Examples
Built in
The numeric values of following color tables can be found in the here
![](/w/images/Colortable_aspect.png)
![](/w/images/Colortable_aspectcolr.png)
![](/w/images/Colortable_bcyr.png)
![](/w/images/Colortable_bgyr.png)
![](/w/images/Colortable_byg.png)
![](/w/images/Colortable_byr.png)
![](/w/images/Colortable_celsius.png)
![](/w/images/Colortable_corine_clc.gcolors.png)
![](/w/images/Colortable_curvature.png)
![](/w/images/Colortable_differences.png)
![](/w/images/Colortable_elevation.png)
![](/w/images/Colortable_etopo2.png)
![](/w/images/Colortable_evi.png)
![](/w/images/Colortable_grey.png)
![](/w/images/Colortable_grey1.0.png)
![](/w/images/Colortable_grey255.png)
![](/w/images/Colortable_gyr.png)
![](/w/images/Colortable_haxby.png)
![](/w/images/Colortable_ndvi.png)
![](/w/images/Colortable_population.png)
![](/w/images/Colortable_precipitation.png)
![](/w/images/Colortable_rainbow.png)
![](/w/images/Colortable_ramp.png)
![](/w/images/Colortable_ryb.png)
![](/w/images/Colortable_ryg.png)
![](/w/images/Colortable_sepia.png)
![](/w/images/Colortable_slope.png)
![](/w/images/Colortable_srtm.png)
![](/w/images/Colortable_terrain.png)
![](/w/images/Colortable_wave.png)
Addons
These user contributions can be found in the GRASS addons SVN repository
![](/w/images/Colortable_palette_chl_etc.gcolors.png)
![](/w/images/Colortable_palette_sst.gcolors.png)
![](/w/images/Colortable_palette_GMT_ocean.gcolors.png)
![](/w/images/Colortable_palette_roygbiv.gcolors.png)
![](/w/images/Colortable_palette_high_intensity.gcolors.png)
![](/w/images/Colortable_palette_low_intensity.gcolors.png)
- The script used to create these thumbnails can be found on the discussion page.