Three formats of Raster Imagery are supported: Compressed Binary, Binary, and Byte. The georeferencing system for raster imagery is PIXEL.
The supported vector entities are LINEs (3), LINESTRINGs (4), SHAPEs (6), and CURVEs (11). Since a curve (with n points) is defined by interpolating through all points (except for the first and last two), curves are approximated as a polyline defined by the interior (n-4) points.
Unsupported entities are ignored during the read operation. For COMPLEX elements, the individual elements comprising the complex element are read in as separate structures, not as one complete structure. The georeferencing system for the vectors is PIXEL.