r.what.color - Queries colors for a raster map layer.

       Glynn Clements

r.what.color outputs the color associated with user-specified category values in a raster input map.

       Values may be specified either using the values= option, or by specifying the -i  flag  and  passing  the
       values on stdin, one per line.

       For  each  value  which is specified, a line of output will be generated consisting of the category value
       followed by the color, e.g.:
       r.what.color input=elevation.dem value=1500
       1500: 223:127:31

       If the input map is an integer (CELL) map, the category will be written as an integer (no decimal point),
       otherwise it will be written in floating point format (printf("%.15g") format).

       If the lookup fails for a value, the color will be output as an asterisk, e.g.:
       r.what.color input=elevation.dem value=9999
       9999: *

       If a value cannot be parsed, both the value and the color will be output as an asterisk, e.g.:
       r.what.color input=elevation.dem value=bogus
       *: *

       The format can be changed using the format= option. The value should be a  printf()-style  format  string
       containing three conversion specifiers for the red, green and blue values respectively, e.g.:
       r.what.color input=elevation.dem value=1500 format=’%02x:%02x:%02x’
       1500: df:7f:1f

       If your system supports the %m$ syntax, you can change the ordering of the components, e.g.:
       r.what.color input=elevation.dem value=1500 format=’%3$02x:%2$02x:%1$02x’
       1500: 1f:7f:df

       Common formats:

           •   Tcl/Tk: format="#%02x%02x%02x"

           •   WxPython: format=’"#%02x%02x%02x"’  or  format=’"(%d,%d,%d)"’

       raster, querying, color table

r.what.color  - Queries colors for a raster map layer.

r.what

       Available at: r.what.color source code (history)

       Accessed: Friday Apr 04 01:19:56 2025

       Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

       © 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual

GRASS 8.4.1                                                                                 r.what.color(1grass)

r.what.colorr.what.color--helpr.what.color  [-i]  input=string   [value=float[,float,...]]    [format=string]    [--help]   [--verbose]
       [--quiet]  [--ui]

   Flags:-i
           Read values from stdin

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:input=string[required]
           Name of existing raster map to query colors

       value=float[,float,...]
           Values to query colors for

       format=string
           Output format (printf-style)
           Default: %d:%d:%d