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How can I find survey benchmark information?

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Hello and welcome to CoreFacts, where we're always short on time and big on science. I'm Steve Sobieszczyk. Today's question is about surveying.

How can I find survey benchmark information?

Depending on what survey benchmark information you're looking for will determine where to look. Most survey benchmarks were not established by the U.S. Geological Survey, but, instead by the National Geodetic Survey, and are available on their website at From there, click on the "Datasheets" link at the top of the page and navigate the subsequent retrieval links. If you need further assistance you can call 301-713-3242 or e-mail

As for USGS survey benchmark data, this is not yet available online. However, you can still inquire about the USGS benchmark information from two sources. For the Eastern U.S. vertical and horizontal control information contact the USGS in Rolla, Missouri, by calling 573-308-3500 or e-mailing For Western U.S. vertical and horizontal control information, contact the USGS in Denver, Colorado, by telephone at 303-202-4400 or by e-mail at

And now you know. Join us every weekday for a new CoreFact. If you have a question you think we should answer on the air, email it to us at or leave us a voicemail at 703-648-5600; don't forget long distance fees do apply.

The USGS CoreFacts is a product of the U.S. Geological Survey, Department of the Interior.

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Title: How can I find survey benchmark information?

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Date Recorded: 4/14/2008

Usage: This audio file is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit this audio.

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Tags: 2008 April geography



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