[Gdal-dev] Create GTiff with 8bit color table

[Frank Warmerdam]

Oliver Eichler wrote:
> Hi,
> 
> I try to make my first experiences with GDAL. I simply want to create some geotiff file from 8bit color table index data. 
> 
> 
>     GDALDriverManager * drvman = GetGDALDriverManager();
>     driver  = drvman->GetDriverByName("GTiff");
> 
>     dataset = driver->Create("test.tif",width,height,1,GDT_Byte,0);
>     GDALRasterBand * band1 = dataset->GetRasterBand(1);
>     band1->SetColorInterpretation(GCI_PaletteIndex);
> 
>     dataset->FlushCache();
> 
> This code will tell me:
>     ERROR 6: SetColorInterpretation() not supported for this dataset.
> 
> What's my fault during setup?

Oliver,

The GeoTIFF driver does not support setting or resetting the color
interpretation.  However, as long as you do it before you start writing
raster data you can use the SetColorTable() method on the band of a
single band file and it will be changed internally to paletted.

> BTW is there any reason why GDALColorTable is not visible in the documentation? 

No *good* reason.  I have fixed this.

Best regards,
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