Is this with MG3 or MG4 files? MG4 uses an alpha channel instead of nodata, so what you describe would be expected in that case.
From: [email protected] [mailto:[email protected]] On Behalf Of Oyvind Idland Sent: vendredi 13 mai 2011 04:28 To: [email protected] Subject: [gdal-dev] GDAL 1.8.0 and MrSid "no-data" values Hi, I just updated to 1.8.0 from 1.7, using the MrSid DSDK 8.0. In order to handle transparency, i have until now used the metadata values from "IMAGE__NO_DATA_VALUE", and simply masked away pixels. After upgrading, the IMAGE__NO_DATA_VALUE yields nothing, neither is it listed when using gdalinfo. The band->GetNoDataValue() doesn't give me any hints either. Should I handle this in a different way ? -- Oyvind
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