1. imageio-ext




GDAL supports .ecw format for read access and write. The current implementation reads any number of bands but returns only as eight bit image data. Coordinate system and georeferencing transformations are read, but in some cases coordinate systems may not translate. Support for the ECW driver in GDAL is optional, and requires linking in external ECW SDK libraries provided by ERMapper. By default the ECW SDK will use up to one quarter of physical RAM for internal caching and work memory during decoding. This is normally fine, but the amount of memory to use can be adjusted by setting the GDAL_ECW_CACHE_MAXMEM configuration variable with an amount of memory in bytes. Config variables can be set in the environment or using the --config commandline switch.