DLG

http://www.mapcruzin.com/free-geodata-shapefiles/usgs-geospatial-data-geodata-geographic-download.htm
DLGs, Digital Line Graphs, use vector format for storing geographic data. So, unlike DRG, their data is stored in points, lines, arcs, and polygons. They are georectified and can contain or convey a wide variety of geographic information, including topography, roads, hydrography, etc., so they are useful as well in many geographic information systems. This is a digital line graph of Spokane, Washington.