GeoExpress enables your applications to use JPEG 2000 compression on geospatial images with the same level of efficiency, metadata, and large-image support already available with MrSID. JPEG 2000 image compression offers many of the advantages implemented in the MrSID format, plus the added benefits of being an international standard (ISO/IEC 15444).
NOTE: Some applications that support JPEG 2000 do not support all of the features that are required to implement the GMLJP2 standard. For more information, see Output Format Specifier.
JPEG 2000 supports multiple bands, so multispectral output can be created from multispectral input without having to go through an output color space (see Creating Multiband JPEG 2000 Files).
Area of interest encoding for JPEG 2000 images is covered in the chapter Encoding Areas of Interest.