DLG

A DLG map, also known as a digital line graph map is a digital visualization of geographic area.  Digital line graph maps show features such as roads, state and county boundaries, streams and other standing water, and elevation contour lines.  DLG maps can be used to in geographic information systems, as well as for automated spatial analyses.  This means that exact longitude and latitude can be identifies at any point on the map.  The DLG map above is showing the bodies of water and roads near Springfield, Ohio.

The map URL is: https://docs.google.com/viewer?a=v&q=cache:_OjPhzz7JwgJ:geospatial.osu.edu/resources/dlg.pdf+&hl=en&gl=us&pid=bl&srcid=ADGEESg1yvvW2UZLtn7fZmAuqr87Zbrs0asZCvwcdisqCai4mbdLCzAHUvzrtux7iS0qh34jC2uvqXjJeMRg3a2xQd0YpDPqM3AJbS5L-tcXVFkT97iUFXZiPw7s26D8fxgJmejcFx0T&sig=AHIEtbTCANgPRuRgEhE8NiVML-qvDBFvAw