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Revision of Primary Series Maps

Fact Sheet 047-00

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Abstract

In 1992, the U.S. Geological Survey (USGS) completed a 50-year effort to provide primary series map coverage of the United States. Many of these maps now need to be updated to reflect the construction of new roads and highways and other changes that have taken place over time. The USGS has formulated a graphic revision plan to help keep the primary series maps current. Primary series maps include 1:20,000-scale quadrangles of Puerto Rico, 1:24,000- or 1:25,000-scale quadrangles of the conterminous United States, Hawaii, and U.S. Territories, and 1:63,360-scale quadrangles of Alaska. The revision of primary series maps from new collection sources is accomplished using a variety of processes. The raster revision process combines the scanned content of paper maps with raster updating technologies. The vector revision process involves the automated plotting of updated vector files. Traditional processes use analog stereoplotters and manual scribing instruments on specially coated map separates. The ability to select from or combine these processes increases the efficiency of the National Mapping Division map revision program.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Revision of Primary Series Maps
Series title:
Fact Sheet
Series number:
047-00
Edition:
-
Year Published:
2000
Language:
ENGLISH
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
U.S. Geological Survey
Description:
2 p.