Only one channel will exist in a GGF file, therefore the format will not be used for multispectral imagery. Geosoft GRID files are always reported as having a channel type of 32R even though within the file they may be any of the traditional data types.
Georeferencing is read and written for GGF files. Once a GGF file is read, the georeferencing units may have to be changed from "METRE" to more appropriate units.
Only image data having a top-to-bottom orientation (sense = 1 and sense = -1) and zero rotation are supported. If the #SENSE (orientation) value in the file is not one of these values, a warning will be issued. The user can use the ImageWorks Transform tool, or the MIRROR PACE program to correct the orientation of unsupported #SENSE images.
Export of Geosoft Version 2.00 binary files is supported. These files are exported with a type of "GGF". They can only hold one channel.
See Also: FIMPORT, FEXPORT, LINK, MIRROR, ImageWorks, GXF, PLT