National Height Modernization National Partner Meeting
Silver Spring, MD
August 19, 2011
In MemoriumDr. Roy K. Dokka
1951 - 2011
National Height Modernization Program Update
National Height Modernization Partner Meeting
Silver Spring, MD
August 19, 2011
Advance science, models, tools, and education in order to:
• Achieve National Height Modernization Program (NHMP)
goals
• Transition to new geopotential datum* (c. 2022)
*New geopotential datum is a priority of NGS Ten Year Plan
STRATEGY
• Access to accurate, reliable heights nationally
• Consistent standards across the nation
• Data, technology, and tools that yield consistent results
regardless of terrain and circumstances
• “Maintain-able” system and process
NHMP GOALS
Science: NHMP supported projects to enhance vertical component of NSRS.
1.GRAV-D fieldwork and data processing to support a 1 cm geoid and the
new geopotential datum
2.Pilot Project in North Carolina to produce a new set of instructions for
FEMA floodplain mapping based on access to the new datums
3. Texas Geoid Slope Validation Survey engaging a variety of testing
methods to address achievable accuracy of a gravimetric geoid model
4. International Great Lakes Datum (IGLD) fieldwork and data processing
completed to update the IGLD, benefitting US-Canada boundary region
NHMP ACCOMPLISHMENTS
Models and tools: NHMP supported many recent NGS products including.
1. Geoid09 release and Geoid12 development
2. HTDP development in partnership with Scripps and University of
Alaska Fairbanks
3. VTDP development including repeat surveys in Southern Louisiana and
subsidence monitoring in Harris-Galveston Subsidence District
4. Transformation tool between epochs after National Adjustment of 2011
NHMP ACCOMPLISHMENTS
Education: NHMP continued to support education and outreach.
1. Monthly teleconferences, now with guest speakers
2. FIG Conference, Australia in April 2010
3. Federal Summit in May 2010
4. State conferences; 2009-2011 events in AK, CO, ID, IL, IN, LA, MD, MO,
NB, NH, NJ, OH, OK, PA, TX, and UT
5. ACSM / Survey Summit / ESRI User Conference in July 2011
6. LiDAR workshop and Partner Meeting in August 2011
NHMP ACCOMPLISHMENTS
• Support of NGS projects (e.g. GRAV-D) and products (e.g.
Geoid models, HTDP, and VTDP) will continue.
• New initiatives may include:
• Developing National Height Modernization Plan (NHMP)
• Updating Height Modernization Guidelines, NGS 58 and
NGS 59
• Infrastructure gap (e.g. CORS) analysis
• Modernize NGS geodetic control datasheets
NHMP FUTURE PLANS
Questions
Renee ShieldsHeight Modernization Manager301-713-3231, [email protected]
http://www.ngs.noaa.gov/heightmod/EventsArchive.shtml
Fast is fine, but accuracy is everything. – Wyatt Earp
A witty saying proves nothing. - Voltaire