DWG workmode is a working environment within OpenCities Map specifically adapted to the editing and reviewing of DWG files. OpenCities Map natively reads and writes both the OpenCities Map DGN file format and the DWG file format thus enabling less data loss from sharing. You can also directly reference a DWG file from a OpenCities Map DGN file.

When you open a DWG file, various OpenCities Map tools are restricted to ensure compatibility with the DWG format. When you are required to create DGN files that are DWG compatible, you can turn on DWG workmode . In both cases OpenCities Map restricts its tools to create only elements that are compatible with the DWG format.

The main purpose of the DWG workmode is to ensure that no DWG-incompatible features are added to the DWG file while editing it in OpenCities Map. This is done by restraining access to certain tools and features of OpenCities Map that remain unsupported in AutoCAD.