DXF is the proprietary, but published AutoCAD graphics file format used by many programs to exchange
CAD/CAM data. It is currently the only means available to import a GIS layer into SADA. A DXF file is
basically an ASCII file where the 2D and 3D components represent a drawing. DXF files to be imported
into SADA must be in ASCII format (not binary). DXFs are made up of four components: points, lines, polygons,
and attributes. The dxf translator in SADA can handle lines and polygons. Attributes
will be ignored and attempting to import a layer of points will currently cause an error.