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Colorado Height Modernization Forum

Colorado Height Modernization Forum. NOAA's National Geodetic Survey. Height Modernization. Zelda LeCoat. A program within NOAA's National Geodetic Survey (NGS) that provides accurate height information

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Colorado Height Modernization Forum

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  1. Colorado Height Modernization Forum NOAA's National Geodetic Survey Height Modernization Zelda LeCoat

  2. A program within NOAA's National Geodetic Survey (NGS) that provides accurate height information by integrating Global Positioning System (GPS) technology with existing survey techniques. What is Height Modernization?

  3. How will the nation benefit from Height Modernization?

  4. Height Modernization reliable heights Gross Reservoir elevation: 7285ft

  5. Estimate River Bank Erosion Erosion

  6. Hazardous Spills

  7. Erosion • Another consequence of wildfires and subsequent heavy rainfall involves erosion.

  8. Height Modernization Objective D E F I N I T I O N NAVD 88 NSRS GEODETIC CONTROL Reliable Accurate Cost-effective Standardized Legally Established

  9. Why National Height Modernization? • Significant time savings in field surveying using GPS • Accurate determination of floodplain boundaries • Precise control for digital ortho imagery • Accurate control for reliable Digital Elevation Models • Improved elevation control for GIS base maps • Subsidence monitoring in mining • Infrastructure monitoring (e.g. dam and floodwall) Falmouth, KY - 1997 The Cincinnati Enquirer

  10. Accurate heights will: IMPROVED THE GEOID

  11. Height Modernization Background • 1994, California – Meetings to discuss height issues and whether GPS can assist in resolving them • 1998 – NGS directed to perform Height Modernization Study • 2000 – NGS begins Height Modernization Planning • 2001 – Height Mod program begins in NC and CA • 2001 – NGS studies in LA and WI

  12. DIGITAL ELEVATION MODELS FROM LIDAR Height Modernization Showcased in North Carolina • FEMA Map Modernization • RTK Network Coverage • Provide the control for the • Digital Elevation Models • Remote sensing activities

  13. B A C K G R O U N D The Roots of Height Modernization In 1994 - First meeting held in Sacramento, CA • Some heights in CA in error by more than a meter • GPS could be immediately used to meet some of California’s requirements • Necessary for the implementation of NAVD 88 In 1998, $1.0 M was added to NGS budget to perform Height Modernization Study

  14. Height Modernization Appropriations (FY01-FY06) B A C K G R O U N D

  15. Who administer the funding for the HM? • NOAA’s NGS, administers the funding to the Congressionally designated recipient through the NOAA grant process. • HM has been funded on a state by state basis thus far. • Individual states have received funding through Congressional support.

  16. Each state has its unique qualities and needs. • Is there sufficient spacing of CORS? • Is leveling required? • Where within a state is there the most need? • Are there geologic processes Such as subsidence, crustal motion How long will the process take?

  17. HEIGHT MODERNIZATION STATES

  18. Partnerships

  19. SpatialReference Centers

  20. , OUTREACH & EDUCATION • GPS- Derived, Height Workshop • Height Modernization Workshop • Height Modernization User Forums • Corbin, Virginia Training Facility Mark Setting and Recovery Leveling, PAGES processing Running ADJUST NEW

  21. www.ngs.noaa.gov/heightmod O U T R E A C H & E D U C A T I O N

  22. C O N C L U S I O N The Future • Provide outreach training and support to states interested in Height Modernization. • Continue efforts to maintain and grow the program. • Research new technology to enhance HMP efforts.

  23. Questions? Zelda LeCoat Cartographer N/NGS1, SSMC3, Room 9452 1315 East-West Highway Silver Spring, MD 20910 301-713-3220, x105 Zelda.lecoat@noaa.gov

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