Colorado Height Modernization Forum Zelda LeCoat Zelda LeCoat

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.

How will the nation benefit from Height Modernization?

Another consequence of wildfires and subsequent heavy rainfall involves erosion.

NSRS NAVD 88 GEODETIC CONTROL Reliable Cost-effective Accurate StandardizedLegally Established D E F I N I T I O N

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 The Cincinnati Enquirer Why National Height Modernization?

Accurate heights will:

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 Height Modernization Background

DIGITAL ELEVATION MODELS FROM LIDAR FEMA Map Modernization RTK Network Coverage Provide the control for the Digital Elevation Models Remote sensing activities

The Roots of Height Modernization In 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 B A C K G R O U N D

Height Modernization Appropriations (FY01-FY06) Fiscal YearAppropriationsStates FY MCA, NC FY M CA, NC, LA, WI FY MCA, NC, LA, WI, MS FY M CA, NC, LA, WI, MS, AL, WA, SC FY M CA, NC, LA, WI, MS, AL, WA, TX, KY FY M CA, NC, WI, MS, AL, SC, TX, KY, AZ B A C K G R O U N D

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.

How long will the process take? 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

HEIGHT MODERNIZATION STATES

Spatial Reference Centers

, OUTREACH & EDUCATION GPS- Derived, Height WorkshopGPS- Derived, Height Workshop Height Modernization WorkshopHeight Modernization Workshop Height Modernization User ForumsHeight Modernization User Forums Corbin, Virginia Training FacilityCorbin, Virginia Training Facility Mark Setting and Recovery Mark Setting and Recovery Leveling, PAGES processing Running ADJUST NEW

O U T R E A C H & E D U C A T 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. C O N C L U S I O N

Questions? Zelda LeCoat Cartographer N/NGS1, SSMC3, Room East-West Highway Silver Spring, MD , x105