Digital Raster Graph:
State Plane - NAD83 - Feet
About the Data
A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) topographic map. The collars have beem removed so the images fit together seamlessly.
When were the Maps Created?
Florida DRGs were made between 1951 and 1993. For an exact year, consult the USGS DRG Survey Map Index. Quads are listed by quad name. Look in the column labeled "Date" for the year the map was made. NOTE: This PDF was created by USGS, not LABINS. To our knowledge, this information is not available in database format.
Determining the File Name
Use the Geographic Profile to find the the 250K quad sheet name and USGS quad number.
Type of DRGs:
7.5" Ordinary DRG
7.5" DRG with photograph as backdrop
The file names are made by appending the DRG Type to the front of the USGS Quad Number. For example, an ordinary DRG for 29084A1 would be O29084A1.tif and the world file is O29084A1.tfw.
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