what is a dwg file

A DWG file is a proprietary binary file format used for containing 2D and 3D design data. It is the native file format for Autodesks AutoCAD software and is widely used by architects, engineers, and designers for various designing purposes. The name DWG is derived from "Drawing" and it contains vector image and metadata for representation of contents of CAD files. DWG files store metadata and 2D or 3D vector image drawings that can be used with CAD programs. DWG files are not human-readable like plain ASCII DXF file format, as they are binary files. There are free viewers available for viewing DWG files on Windows Operating System such as the Autodesk's free DWG TrueView. DWG files usually include information about the image coordinates and any metadata associated with it.