[GRASS-dev] [GRASS GIS] #3043: Change default color table

GRASS GIS trac at osgeo.org
Fri May 27 22:45:08 PDT 2016

#3043: Change default color table
  Reporter:  wenzeslaus   |      Owner:  grass-dev@…
      Type:  enhancement  |     Status:  new
  Priority:  blocker      |  Milestone:  7.2.0
 Component:  Raster       |    Version:  svn-trunk
Resolution:               |   Keywords:  r.colors, d.rast, rainbow
       CPU:  Unspecified  |   Platform:  Unspecified

Comment (by wenzeslaus):

 `viridis` is now available in trunk (try `r.colors`). This color table was
 developed for Matplotlib based on color properties and color perception
 and then it won the community voting. See the attachments to see how it
 behaves including gray scale print and simulated color blindness (I can
 share also the full resolution images).

 The number one unresolved thing from my point of view is that `viridis`
 has 256 entries (most of the other color tables in GRASS has less than 20)
 and some test should be done to see if there is some performance
 difference. Also two pairs of colors are actually the same for the same
 values. (These issues can be resolved any time later.) Finally, it seems
 that on some screens `viridis` starts with more blueish color which
 doesn't look that good while on some other with more violet color which
 probably the right way (and looks better) but that's more a local issue.

 Is anybody opposed to the change of default color table from `rainbow` to
 `viridis` in GRASS GIS for release 7.2?

Ticket URL: <https://trac.osgeo.org/grass/ticket/3043#comment:4>
GRASS GIS <https://grass.osgeo.org>

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