Scanned Topo Maps (Digital Raster Graphics)

In the viewer's left-side table of contents, select the Overlays tab, then the Other Featured Data panel, then click the Scanned Topo Maps from USA Topo layer.  Map images are displayed at view scales of 1:1,155,000 and larger.These images are derived...
Information on the historical topographic map collection is available at The National Map: Historical Topographic Map Collection site.Learn more: US Topo and Historical Topographic Map Collection
The phrase digital raster graphic, or DRG, can mean several things.  It is a generic term used to mean almost any scanned image of a paper map.  The term "USGS DRG" refers more narrowly to 250 DPI GeoTIFF images created in the period 1995 to 2000, when...