DWF (Design Web Format™) is an open, secure file format developed by Autodesk for sharing engineering design data.
When you publish to DWF, you create an electronic version of the map that can be displayed using Autodesk® Design Review, which you can download from the Autodesk Website. The DWF format can include attribute data and graphical elements, including any draped raster files. All layers and styles are published, with no loss of information.
As long as you have assigned a coordinate system to all the maps in your DWF file, the publishing operation will automatically convert the coordinate information to latitude/longitude coordinates. GPS devices that use the NMEA 0183 protocol and the Autodesk DWF Viewer can use the georeferencing information, for example, to pan and center maps dynamically.