Feature request #443
No Data Value for three band images
|Pull Request or Patch supplied:||Resolution:||fixed|
|Easy fix?:||No||Copied to github as #:||10502|
A common kludge for three band satellite images is to reserve either 0,0,0 or 255,255,255 for no data. Many satellite images have significant background data. To mosaic images effectively requires a mechanism to make the nodata areas transparent.
#2 Updated by fosnight-usgs-gov - over 13 years ago
Replying to [comment:1 [email protected]]:
see also my wish: https://svn.qgis.org/trac/ticket/441
A more general proposal would certainly be preferred. Transparency is not handled elegantly within scientific systems. As formats, PNG and TIFF do about the best for RGB images. My preference within QGIS would be to set the value for each band as a metadata/symbology property. Old school but simple and independent of raster format.