[GRASS-user] logarithmic scale in raster legend

[L. Prevett]

Have you tried using the echo command to pipe variables and characters to
d.text  for user defined labels and ticks? It takes some work with the
at=x,y coords to get the legend, labels and ticks where you want them.

  echo "message" | d.text size=3 at=37,25 color=orange

  To erase map elements or labels, you can echo dummy characters the same
color as the background:

  echo "##########" | d.text -b size=5 at=18,6 color=white

 You may also want to use a graphics tool (e.g, ImageMagick, convert)
 to do various graphics conversions on the maps.

L. Prevett


On Mon, Jun 9, 2014 at 8:36 AM, Veronica Andreo <veroandreo at gmail.com>
wrote:

> Hi list!
>
> I have these raster maps of chlorophyll concentration (mg/m3) with a lot
> of very small values (from 0.02 to 1.5) and few high values (between 20 and
> 100)... I managed to create my own color table to get a good visualization
> of the variation... but when I display the legend, i loose the color
> variation in smaller values...
>
> Is it possible to create a logarithmic legend or at least determine which
> tick-marks I'm interested in?? I've tried with "use" parameter in d.legend
> (which seemed to meet my needs) setting it to: 0.01,0.1,1,10,100, but works
> only for categories... There's no such a thing in ps.map, either... which
> would be the right approach? any ideas?
>
> Thanks much in advance!
> Best,
>
> Vero
>
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20140613/05e7fe43/attachment.html>