[gdal-dev] Problem with gdal_translate

[Even Rouault]

Selon Chris Emberson <chrisemberson at hotmail.com>:

The behaviour you see is expected. -expand rgb only works for bands that have
color maps. You can transform your grey scale FILEA.asc into a RGB file by doing
this :

gdal_translate -of GTiff -co "TILES=YES" -b 1 -b 1 -b 1 FILEA.asc FILEB.tif

This will use the source band 1 for the R, G, B components of the output file.
You may need to use the scaling/translate options of gdal_translate to reduce
the dynamics to 8 bits.

>
> I am having trouble converting a single band raster (.asc) when using the
> GDAL utility gdal_translate (version 1.6)
>
> This is the command...
> gdal_translate -of GTiff -co "TILES=YES" -expand rgb FILEA.asc FILEB.tif
>
> I get this message....
>
>
>
>
> Error : band 1 has no color table
>
> I want to be able to tile this raster using Mapnik - therefore it needs to be
> a 3 band tiff - Can anyone help with this problem?
>
> Thanks in advance
>
> Chris
>
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