[mapserver-users] Raster parameter PROCESSING "BANDS=..." and ECW files

[Armin Burger]

Hi all

I noticed a strange behaviour of MapServer (5.6.7 and 6.0.1) when 
defining for a raster layer based on an ECW file a processing parameter 
for the bands order like

PROCESSING "BANDS=3,2,1"

The order of the bands does not have any effect. The image is always 
displayed in the original band order 1,2,3, whatever I define for the 
BANDS value. If I just define a single band, like
"BANDS=3" or "BANDS=1"
then it's displaying it correctly using the right band.

This problem seems just to appear for ECW files, not e.g. for Tiff 
files. If I wrap a VRT image around the ECW and use this VRT in the DATA 
tag of the map file then the BANDS order is taken into account, just not 
when defining the DATA using the pure ECW file.

Any ideas what's going wrong?

Thanks for any hints

Armin