9 November 2001
How to Obtain Aerial Photographs
USGS Fact Sheet 081-99 (April
1999)
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In
this part of the original 9 x 9 inch photograph, at a scale of
1:40,000, 1 inch on the photograph represents 3,333 feet on the
ground. The original photograph is from NAPPW Roll 6860, Frame
59.
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The
U.S. Geological Survey (USGS) maintains an informational data base of
aerial photographic coverage of the United States and its territories
that dates back to the 1940's.
This information describes
photographic projects from the USGS, other Federal, State, and local
government agencies, and commercial firms.
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In
this 2X (18 x 18 inch) enlargement of the same photograph, at
a scale of 1:20,000, 1 inch on the photograph represents 1,666
feet on the ground.
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The pictures on
this page show a part of a standard 9- by 9-inch photograph and the
results obtained by enlarging the original photograph two and four times.
Compare the size of the Qualcomm Stadium, Jack Murphy Field, in San
Diego, Calif, and the adjacent parking lot and freeways shown at the
different scales.
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In
this 4X (36 x 36 inch) enlargement of the same photograph, at
a scale of 1:10,000, 1 inch on the photograph represents 833 feet
on the ground.
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USGS Earth Science Information
Center (ESIC) representatives will assist you in locating and ordering
photographs. Please submit the completed checklist
and a marked map showing your area of interest to any ESIC.
Information
For information on these
and other USGS products and services, call 1-888-ASK-USGS, use the Ask.USGS
fax-on-demand system, which is available 24 hours a day at 703-648-4888,
or visit the general interest publications Web site on mapping, geography,
and related topics at http://mac.usgs.gov/mac/isb/pubs/pubslists/index.html.
Please visit the USGS home
page at http://www.usgs.gov/. 