[GRASS-dev] [GRASS GIS] #2714: wish: logarithmic legend for raster maps

GRASS GIS trac at osgeo.org
Sat Jun 18 12:44:14 PDT 2016

#2714: wish: logarithmic legend for raster maps
  Reporter:  veroandreo   |      Owner:  grass-dev@…
      Type:  enhancement  |     Status:  new
  Priority:  normal       |  Milestone:  7.0.5
 Component:  Display      |    Version:  svn-releasebranch70
Resolution:               |   Keywords:  d.legend, gsoc2016, cartography
       CPU:  x86-64       |   Platform:  All

Comment (by annakrat):

 Replying to [comment:7 lazaa]:
 > I added flag {{{-l}}} for logarithmic  legend. I hadn't any good data so
 please feel free to test.

 you can also just compute flow accumulation with
 r.watershed -a elevation=elevation threshold=1000 accumulation=flowacc

 I tested it by setting labels 1,10,100,1000 and there should be the same
 distance between them, but it's not, so there must some mistake. See an
 example of logarithmic legend [http://i.stack.imgur.com/7VvVB.png here].

Ticket URL: <https://trac.osgeo.org/grass/ticket/2714#comment:9>
GRASS GIS <https://grass.osgeo.org>

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