[GRASS-dev] any way to know color assigned to a cell?

peter.loewe at gmx.de peter.loewe at gmx.de
Thu Apr 19 10:14:37 EDT 2007

Including a "RGB"-flag into r.stats would still be a good thing.

Right now, creating a vector polygon layer with a GRASSRGB-column out of a raster map + colortable needs some manual input or custom shell scripting to set up tthe RGBCOLOR values.

Having a RGB-functionality in r.stats would make this (and other tasks) easier.


>Bob Covill wrote on 04/18/2007 09:02 PM:
>> On Wed, 2007-04-18 at 17:19 +0100, Glynn Clements wrote:
>>> Bob Covill wrote:
>>>>>>> Yeah; we could probably do with a "r.what.colors" module.
>>>>> Michael:
>>>>>> I was contemplating a wxPython histograming module, like the TclTk
>>>>>> profiling module, and liked the option in d.histogram of being able >to
>>>>>> use the color table for the histogram colors. But this seems like a
>>>>>> pretty intensive batch of calculations to do it.
>>>>> you could try "r.profile -c" with a profile which starts and stops at
>>>>> the cell center (length=0). Also it should be very simple to add a >flag
>>>>> just like "r.profile -c" to r.what, if that helps.
>>>> I have a version of r.what that I modified to optionally output RGB
>>>> color. If interested I could commit to CVS?
>> I have committed the change to r.what. It now has a "-r" flag (-c was
>> taken) that will output the RGB for the selected point.
>I didn't follow this in detail, but with this new -r flag, what is
>r.what.color providing?
>Is there a need to keep it?
>Markus (who always has an eye on too similar modules)

Dr. Peter Löwe


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<peter.loewe at gmx.de>

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