FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: USGS 1:100,000 DRG (DIGITAL RASTER GRAPHICS)

Geodataset Name:    DRG100
Geodataset Type:    Image
Geodataset Feature: Image

These images are scanned USGS 1:100,000 quadrangles (paper) that have been georeferenced using UTM coordinates then reprojected to an Albers projection. All 1:100,000 quadrangles for Florida were merged into one statewide image.

RESOLUTION:                Scanning was done at 250 dpi.
DATA SOURCE(S):            1:100,000 scale, 30x60-minute topographic quadrangles 
                           created by the USGS.
DATE OF SOURCE:            Varies by quadrangle.
SCALE OF ORIGINAL:         1:100,000
GEODATASET EXTENT:         Statewide

DRG images are intended for use as an image backdrop. The scale of these images is considered no better than 1:100,000 and therefore these images should not be used for projects requiring a high level of accuracy.

PROJECTION PARAMETERS:

Projection                               ALBERS
Units                                    METERS
Datum                                    HPGN
Spheroid                                 GRS1980
1st standard parallel                    24   0  0.000
2nd standard parallel                    31  30  0.000
central meridian                        -84   0  0.000
latitude of projection's origin          24   0  0.000 
false easting (meters)                   400000.00000
false northing (meters)                  0.00000

DATA SOURCES CONTACT(S):

Name:         U.S. Environmental Protection Agency Ecosystems Research Division 
Abbr.name:    EPA ERD
Address:      Athens, GA
Contact Person:   
Phone:        
Fax:          
Web site:           http://www.epa.gov/docs/AthensR/

FGDL CONTACT:

Name:                   FLORIDA GEOGRAPHIC DATA LIBRARY
Abbr. Name:             FGDL
Address:                Florida Geographic Data Library
                        431 Architecture Building
                        PO Box 115706
                        Gainesville, FL  32611-5706
Web site:           http://www.fgdl.org

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