Colorado Height Modernization Forum

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Colorado Height Modernization Forum
NOAA's National Geodetic Survey
Height Modernization
Zelda LeCoat
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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?
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• How will the nation benefit
• from
• Height Modernization?

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Height Modernization reliable heights
Gross Reservoir
elevation 7285ft
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Estimate River Bank Erosion
Erosion
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(No Transcript)
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Hazardous Spills
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Erosion

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

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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
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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
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• Accurate heights will

IMPROVED THE GEOID
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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

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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

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

• 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
  Californias requirements
• Necessary for the implementation of NAVD 88
• In 1998, 1.0 M was added to NGS budget to
  perform Height Modernization Study

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Height Modernization Appropriations (FY01-FY06)
B A C K G R O U N D
Fiscal Year Appropriations States
FY 2001 2.25 M CA, NC
FY 2002 3.75 M CA, NC, LA, WI
FY 2003 3.75 M CA, NC, LA, WI, MS
FY 2004 9.0 M CA, NC, LA, WI, MS, AL, WA, SC
FY 2005 9.6 M CA, NC, LA, WI, MS, AL, WA, TX, KY
FY 2006 9.9 M CA, NC, WI, MS, AL, SC, TX, KY, AZ
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Who administer the funding for the HM?

• NOAAs 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.

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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

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HEIGHT MODERNIZATION STATES
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Partnerships
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Spatial Reference Centers
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OUTREACH EDUCATION
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• 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
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www.ngs.noaa.gov/heightmod
O U T R E A C H E D U C A T I O N
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The Future
C O N C L U S I O N

• 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.

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