Digital Geodata Series
DGS98-1 Monochromatic Bit-Mapped Image of New Jersey Planimetric Base Map
(1:500,000 scale)
 dgs98-1.zip (211KB)
A bit-mapped image of the U.S. Geological Survey 1:500,000 scale, planimetric
base map for New Jersey has been compiled by the N.J. Geological Survey.
The monochromatic image was scanned at 400 dots-per-inch resolution from
a stable-base, mylar map. The image was georegistered and rectified to the
1983 North American Datum (NAD83) in State plane coordinate feet using the
ARC/INFO Geographic Information System. The registration process used four
links corresponding to 1-degree intersection points from a geographic grid
covering New Jersey. The image was processed after registration to increase
the clarity of the image. Post-processing steps included: 1) removing line
boundaries for built-up town areas over 10,000 population; 2) removing population
integer codes corresponding to lines specified in the previous item; and
3) removing the 1 degree geographic grid lines. The bit map uses an uncompressed
tagged image file format(TIFF). Image registration parameters are included
in an accompanying ASCII text file.
Click on the image below for a detailed view
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