mirror of
https://github.com/mapnik/mapnik.git
synced 2025-12-08 20:13:09 +00:00
GDAL can support non-alpha mask band, such as a TIFF IFD with Subfile type=transparency mask. This can be typically used to create a GeoTIFF with YCbCr JPEG compression for RGB bands and DEFLATE compression for the mask band.