Recent Northern Gulf Coast Height Modernization Control Projects Denis Riordan, PSM 2009 Mississippi Statewide Leveling Project.

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Presentation transcript:

Recent Northern Gulf Coast Height Modernization Control Projects Denis Riordan, PSM 2009 Mississippi Statewide Leveling Project Mobile, AL: August 17, 2012 Batesville, Hattiesburg, MS: August 20, 22, 2012

Presentation Outline 2009 MS Project Level Adjustment Updates to Coastal Alabama Changes in Datasheets

Presentation Outline their need for flood insurance

2009 MS Height Mod. Project – Leveling Adjustment

X

Technical Report 50 Study Benchmarks

2009 MS Leveling Adjustment Utilize updated VTDP model Use more current vertical in adjacent states Extend adjustment out to better known control Refine adjustments through checks & analysis of statistical results until final adjustment meets NGS specified tolerances

Green Line: 2009 Data

AL adjusted lines: Parts 1-5

Where to get control information? 2009 MS Height Mod. Project

AL adjusted lines: Parts 1-5

2009 MS Leveling Adjustment

2009 Gulf Coast Updates - Datasheets

?? Questions ?? Denis Riordan, National Geodetic Survey Advisor to Mississippi (601) MS Height Modernization Project

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