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Article: National readjustment of NAD83. The National Geodetic Survey (NGS) is responsible for the maintenance of the National Spatial Reference System (NSRS). One of the NGS goals under the NSRS is to maintain a network of control stations that is suitable in terms of accuracy for all the work that professional surveyors do.(fromthegroundup)
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- January 1, 2007
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CopyrightCOPYRIGHT 2007 BNP Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Perhaps this is something that is easy to take for granted, but it is critically important in our profession. Significant changes have taken place over the last 20 years that have driven the demand for accuracy substantially higher. Better equipment, improved field methods and more comprehensive reduction software allow us to meet these high accuracy demands, but only when we have accurate and consistent control positions to begin from.
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NGS began a bold initiative in June 2005 aimed at a national readjustment of the North American Datum of 1983 (NAD83), a datum of the NSRS. When completed this year, this new adjustment will provide ...