DXF Files

AutoCAD® .DXF files must be "clean", specifying only 2-D or 3-D polylines.

CVTGMS converts POLYLINES in the ENTITIES SECTION to surfaces. The "Elevation" and "Extrusion" information contained in the .DXF file is saved in the .ECS file.

CVTGMS saves all of the coordinate transform information in the .ECS file, so that the projected (X,Y,Z) coordinates may be recovered when a GM‑SYS model is exported by CVTGMS. This process will "straighten" profiles that "bend" and that the original Y-offset from the profile cannot be recovered.