Maurice, you can try the following Configuration Variable: MS_RASTER_IMG_CHANNELS Sets the band number to use for Red, Green, Blue and Alpha channels when a file whose format is IMG is attached. The "0" value can be set for the Alpha channel if none is required. When this variable is defined, all attached Erdas IMG rasters will use the same band order. The default value is: MS_RASTER_IMG_CHANNELS 1 2 3 4. HTH, Pascal
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