[gdal-dev] how to create an image with a colortable?
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 ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] how to create an image with a colortable?
Sam, What did you do? What errors did you get? On Wed, Sep 26, 2012 at 12:23 PM, Samantha Goodchild-Brown samant...@geograph.co.za 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#** Howtocreateormodifyanimagecolo**rtablehttp://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 __**_ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/**mailman/listinfo/gdal-devhttp://lists.osgeo.org/mailman/listinfo/gdal-dev -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] how to create an image with a colortable?
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 ColorInterpPalette/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 samant...@geograph.co.za mailto:samant...@geograph.co.za 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 ___ gdal-dev mailing list gdal-dev@lists.osgeo.org mailto:gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] how to create an image with a colortable?
Sam, datatype is handled by gdal. Can you provide the gdalinfo output of the GeoTiff? On Wed, Sep 26, 2012 at 4:28 PM, Samantha Goodchild-Brown samant...@geograph.co.za wrote: 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 ColorInterpPalette/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 samant...@geograph.co.za 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 ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
