[GRASS-user] trimming color table
glynn at gclements.plus.com
Fri Sep 18 01:06:51 PDT 2015
Paulo van Breugel wrote:
> When creating a new map based on an existing using r.mapcalc, the color
> table of the old map is used for the new map. However, if the new map
> only contains a subset of the values of the old map, how can I trim the
> color table so it only contains color definitions for the values present
> in the new map? Any easy (automatic) way to do this? Note, this is
> probably only useful for integer (category) maps.
There isn't an automatic way to do this. The simplest way is probably
along the lines of
r.colors.out map | command | r.colors map rules=-
where "command" is a grep/sed/etc command which filters the rules.
Glynn Clements <glynn at gclements.plus.com>
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