Architects and urban planners use CAD Mapper to save hours of routine drawing.
Download a file of any location, then edit it in AutoCAD, Rhino, SketchUp, or any design program that can open DWG/DXF files.
CAD Mapper transforms data from public sources such as OpenStreetMap and NASA into neatly organized CAD files.
It's free for areas up to 1 km2 and for access to over 200 whole city files.
These are huge and simplified two-dimensional DXF files of metropolitan area road networks, which include 3 levels of roads as polylines, as well as bodies of water. You can also find these in GIS format at Mapzen Metro Extracts.
[-][Top][2D Wireframe]and click
[Top]again to recenter. Read more about how to use these in your program.