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RECTIFYING Louisiana CORS Networks with Vertical Datum Requirements November 2012

RECTIFYING Louisiana CORS Networks with Vertical Datum Requirements November 2012. Stephen Estopinal, P.E., P.L.S. PROBLEMS FACING HEIGHT IN SOUTH LOUISIANA. Subsidence. Network Adjustments (epoch). Geoid Model Updates. GPS DERIVED ORTHOMETRIC HEIGHT (Elevation)

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RECTIFYING Louisiana CORS Networks with Vertical Datum Requirements November 2012

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  1. RECTIFYINGLouisiana CORS NetworkswithVertical Datum RequirementsNovember 2012 Stephen Estopinal, P.E., P.L.S.

  2. PROBLEMS FACING HEIGHT IN SOUTH LOUISIANA Subsidence Network Adjustments (epoch) Geoid Model Updates

  3. GPS DERIVED ORTHOMETRIC HEIGHT (Elevation) The orthometric height is calculated from the ellipsoidal and geoidal separation.

  4. GEOID Each published Geoid is an attempt to model Earth’s equipotential surface

  5. The TED Example The case for 1 cm level geiod STATIC STATIC STATIC STATIC STATIC STATIC STATIC RTN RTN

  6. POTENTIAL PROBLEMS

  7. DEEP ROD MARKS Available to all users; GPS Equipment optional; Will monitor deep subsidence and near surface movement; Provide platforms for Absolute Gravity Meters; Develop research data for Coastal Restoration designs.

  8. Office (225) 769-3400 Fax (225) 769-3596 QUESTIONS??? Stephen Estopinal, P.E., P.L.S. Stephen.Estopinal @ SJBGroup.com

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