Uncompressed 8-bit unsigned, 16bit signed, and 32bit real data can be processed. Version 1.1 would be one channel data. Version 2.0 may be up to 9 channels. Pseudocolour tables are not supported at this time.
CIB (Controlled Image Base) frame files with the support RPF (Raster Product Format) superstructure available, can also be read. This special case uses Vector Quantization compression and tiling. In this case, a LUT may be imported with the image channel. In these cases, the value 216 will be used as a no-data value (as it is found in the file).
Note: The CIB format support is highly specific, and there is no reason to believe that non-CIB files that are tiled or compressed will be properly supported.
Where the Image Coordinate System is G (Geodetic) or C (Geocentric), NITF files will have 'LONG/LAT' Georeferencing when read. NITF files with Military Grid Reference System (MGRS) Georeferencing will have 'UTM' Georeferencing when read. All other Georeferencing is treated as 'PIXEL'.
Export of NITF files is supported. These files are exported with a type of "NIT".
NITF Version 2.0 can accommodate up to 9 channels. (NITF Version 1.1 can accommodate one channel.) The option "LON" is used to specify that the FILI georeferencing is already "LONG/LAT". This is to create space for the "LONG/LAT" georeferencing in the header when the file is created and the fields are filled in at a later point.
The georeferencing will NOT be reprojected to LONG/LAT. The option should only be set to "LON" if the georeferencing is already "LONG/LAT".
Similarly, the option "UTM" is used to specify that the FILI georeferencing is already "UTM". This indicates that the space for the MGRS georeferencing in the header should be set aside when the file is created. The fields are filled in later.
The georeferencing will NOT be reprojected to UTM. The option only sets the NITF file's georeferencing to MGRS if the input file's georeferencing is already "UTM".
The default georeferencing is N (None).
The option "1.1" is used to specify that the file is to be NITF Version 1.1. The default is NITF Version 2.0.
option = | N (none) georeferencing; NITF Version 2.0; option = "UTM" | U (utm grid) georeferencing; NITF Version 2.0; option = "1.1" | N (none) georeferencing; NITF Version 1.1; option = "LON 1.1" | G (geodetic) georeferencing; NITF Version 1.1; option = "1.1 LON" | G (geodetic) georeferencing; NITF Version 1.1;