After using gdal info to confirm my input image is a greyscale, using
the FAQRaster intructions I used gdal_translate to create a VRT.
I then opened it in crimson editor to edit the colorinterp and add in
the colortable. I used
<ColorInterp>Palette</ColorInterp>
<ColorTable>
<11 c1="181" c2="69" c3="15"/>
<12 c1="224" c2="86" c3="20"/>
<13 c1="229" c2="130" c3="21"/>
AHA, I see my first error. I forgot to add the '/' to close the
paragraph. I am VERY RUSTY at this.
Gdal was complaining about not being able to close the file and refering
me to </VRTRasterBand> and
</VRTDataset> which confused me greatly as I didn't touch it at all.
Now it runs, but fails because it tells me my datatype is not compatiable.
This is a different issue I will take up separately as I expect has
nothing to do with GDAL.
Many thanks. Will keep at it.
On 2012/09/26 11:54, Chaitanya kumar CH wrote:
Sam,
What did you do? What errors did you get?
On Wed, Sep 26, 2012 at 12:23 PM, Samantha Goodchild-Brown
<[email protected] <mailto:[email protected]>> wrote:
I need to change a greyscale image to Palette and specify the
colors to use for specific values.
However I am getting very confused with all the 'comments' and
references and instructions
eg.
In "
http://trac.osgeo.org/gdal/wiki/FAQRaster#Howtocreateormodifyanimagecolortable";
it is explained how to edit a VRT to make a new tif with a color
palette of your choice.
However in later 'fishings' I saw someone mention that this
doesn't work and that the only way to do it is with scripting or
programming.
I am now also trying as it seems to be the simplest method but I
am also failing.
Other tickets etc that come close are in the region of 4 years old
etc and way over my head.
Besides the obvious (gdal error messages), can anyone tell me why
this is happening? what I need to tweek? if a fix is on the way?
is it still valid that the only workaround is with scripting?
Does anyone know of another open source method that doesn't
involve scripting?
Many thanks
Sam
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Best regards,
Chaitanya kumar CH.
+91-9494447584
17.2416N 80.1426E
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