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Asked: 2026-06-14T11:35:06+00:00

I am using the GDAL C++ library to reclassify raster map images and then

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I am using the GDAL C++ library to reclassify raster map images and then create an output image of the new data. However when I create the new the new image and open it, the classification values don’t seem to have a color defined, so I just get a black image. I can fix this by going into the image properties and setting a color for each of the 10 classification values I’m using, but that is extremely time consuming for the amount of maps and trials I am doing.

My question is, is there a way to set metadata info through the GDAL API to define a color for each classification value? Just the name of the right function would be great, I can figure it out from there.

I have tried this using ArcGIS and QuantumGIS, and both have the same problem. Also the file type I am using is Erdas Imagine (called “HFA” in GDAL).

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1 Answer

  1. Editorial Team

    You can use SetColorTable() method on your raster band. Easiest to do is to fetch one pre-existing raster using GetColorTable(), and pass it to your new raster.

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