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The Future Role of Geodetic Datums in Control Surveying in the United States

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For nearly 200 years, the U.S. Government has been in the business of defining, maintaining, and providing access to geodetic datums. However, for all but the last 20 years, the definition and realization of those datums has been through very similar observational techniques using passive marks in the ground. The advent of space geodetic techniques has allowed the National Geodetic Survey to approach datum definition and control surveys in an entirely new way. A plan is being established which will allow future datums to be defined through 4-dimensional coordinates on continuously operating GNSS reference stations (CORS) and an accurate gravimetric geoid, thus effectively minimizing the need for passive survey marks in the ground.
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Document Type: Research Article

Publication date: June 1, 2006

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