Land Boundary Information System
Mapping Data
Digital Raster Graphic
UTM NAD27
Digital Raster Graphic
UTM - NAD27 - Collars Intact
You are about to enter an FTP site. The folders are organized by 250K sheet number and the files are
identified by USGS quad numbers.
New File Format! These files have been compressed for your convenience. The .TIF and .TFW files
are included in the .EXE file.
Enter FTP Site
100K Files
250K Files
About the Data
A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) topographic map.
The scanned image includes all map collar information.
| Projection: | | UTM |
| Datum: | | NAD27 |
| Units: | | Meters |
| Graphics Type: | | TIFF |
| World File: | | TFW |
| Collar Status: | | Intact |
When were these 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.
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Determining the File Name
Use the Quad Name Locator to find the
250K quad sheet name. You will also need to know the USGS quad number.
Type of DRGs:
| C = | 250K quad |
| F = | 100K quad |
| O = | 7.5" Ordinary DRG |
| P = | 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.
Downloading Instructions
Due to the large file size, FTP
is recommended for downloads.
These images are available on CD for $25 each. (A CD holds
about half of a 250K sheet.)
Special Software Needed
The DRGs have been compressed and the resulting .EXE file contains
both the .TIF and .TFW world file. Use standard decompression software to
extract the original files.
GIS software is recommended for georeferencing files.
Standard TIFF viewer (such as PhotoShop) on computer with sufficient memory can be used to print or edit files. Note that this software
will not georeference the files.
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