Geodetic Control Network Height Modernization – State by State
• Washington Department of Natural Resources
received $440K in FY04 and $440K in FY05 in
Height Modernization grants.
• Established the Spatial Reference Center of
• Between 1998 and 2005, the State of Wisconsin invested over $6.5M to
Washington (SRCW), a member-driven non-profit
the Wisconsin Height Modernization Plan (WI-HMP), using a combination of
organization to improve the reliability of positioning
state funds and federal planning and research funds from the Federal
information within Washington State.
• Partnering with Pierce County to conduct a project
• The Wisconsin Department of Transportation (WisDOT) received NOAA
with nearly 200 miles of leveling and related GPS
grants of $400K in FY03, $2.66M in FY04, and $2.66M in FY05.
Height Modernization observations.
• Developed WI-HMP phases (geographic regions of the state) to ensure
• Floodplain Mapping Partnership activity with other seamless and compatible data.
several state and local agencies.
marksetting • Leveling and GPS surveys conducted with WisDOT personnel and private Kentucky
• Training - SRCW and NGS held two 2-day contractors • Morehead State University received $440K grant in FY05 to implement a Height Modernization Program, in
Leveling Seminars and Workshops combining • Five of eight phases complete. cooperation with the Kentucky Division of Geographic Information and the Kentucky Transportation Cabinet.
Existing CORS theory and actual field work examples of 1st and
• The goal of the Kentucky Height Modernization Program is to bring accurate and reliable heights to any location
• No field observations were possible in 2005 due to severe reductions in
New CORS 2nd order leveling techniques in in Renton and state staffing of the WI-HMP. in the Commonwealth at any time.
Phase 5 GPS
Spokane (June 2005). • Monumentation continued in the first half of Phase 7 during 2005 and is • The realization of this goal begins with the establishment of a Kentucky CORS Network.
submitted to NGS;
• SRCW sponsored a Real-Time GPS conference scheduled for completion in 2006. • The existing vertical control network will be studied in pilot project areas to determine the best method to
leveling to NGS by
(September 2005). • Field surveying in the Phase 6 area, both GPS and leveling, are now transfer orthometric elevations to the HARN and CORS.
• Three Height Modernization User Forums were scheduled beginning in the early spring of 2006. • The improved geodetic control will be used to improve the regional geoid model and provide a reference frame
held in September 2004 in Vancouver, Seattle, and • Mark recovery -Phase 8 ongoing; completion scheduled for early 2006. for surveying and remote sensing measurements.
Survey data submitted
Spokane. • Education and outreach program. • Height Modernization User Forum held (October 2004) in Somerset.
and loaded for Phases
1,2,3 and 4. • Users Forum held in Wisconsin Rapids, November 2003.
Alaska • Wisconsin continues to be very active in sharing technology and
experience with other interested states.
System Networks • North Carolina one of the two original states to receive Height Modernization funding.
• The North Carolina Geodetic Survey (NCGS) received $1.0M grant in FY01, $890K in FY02, $890K in FY03, $890K in FY04 and $890K in FY05.
Tuolumne County • North Carolina Floodplain Mapping Program uses Height Modernization to gather elevation data to evaluate and improve the accuracy of the floodplain maps.
Yolo County • Cooperative effort with the Department of Homeland Security to use the results of the HMP surveys and the CORS to cover the State with modernized Flood
Contra Costa County Insurance Maps.
• Approximately 40 CORS in the state, with plans to expand the network.
South SF Bay • North Carolina established Real-Time Kinematic CORS Networks in several urban areas, with plans to expand coverage.
• Several Height Modernization projects have been completed: Buncombe, Gaston, Henderson, Wake, and Watauga Counties. Height Modernization projects are
San Joaquin Valley currently underway in Ashe and Haywood Counties.
• Leveling connections to CORS are ongoing.
San Simeon Resurvey • Outreach, education, technology transfer, and software support for Height Modernization activities conducted by NOAA and NCGS through a cooperative agreement
with North Carolina Agricultural and Technical State University (NCA&T).
California • Current NCA&T projects include the development of a Windows interface software program for ADJUST which will be made available to the public when complete.
• The California Spatial Reference Center (CSRC) provides geodetic CGPS Only • NCA&T hosted twp 2-day Height Modernization workshops (September 2004 and 2005) for beginners and advanced users of GPS.
services to ensure the availability of accurate, consistent, and timely
CORS Leveling • NCA&T developing a GeoSpatial Curriculum and anticipates a program offered in 2006.
spatial referencing data, including coordinates and data from the Spatial Reference Centers
Texas • In FY04, User Forums were conducted in Raleigh and Charlotte.
Continuously Operating Reference Stations (CORS) stations in
• In FY05 Texas A&M University-Corpus Regional Leaders
• The CSRC also monitors temporal changes in geodetic coordinates Christi received a grant of $665K for Lead Agencies
due to tectonic motion, earthquakes, volcanic deformation and land Height Modernization in Texas. Height Modernization States
subsidence. • Height Modernization has been
• In FY01 California was one of the first states to receive Height underway in the Harris-Galveston Coastal
Interested States Mississippi
Modernization funding through NOAA. Subsidence District since the mid-1980’s • The University of Southern Mississippi (USM) received a
• $1.0M was appropriated for the creation of the CSRC. The CSRC has when GPS was first used to measure and $400K grant in FY03, $440K in FY04, and $530K in FY05 for
since received $1.0M in FY02, FY03, and FY04 and $0.5M in FY05. monitor subsidence. Height Modernization efforts in Mississippi.
• Several Height Modernization projects (GPS and leveling) have been • Height modernization initiative to install a network of Alabama
completed in California, including the San Joaquin Valley Project, Contra reference stations throughout the state and water level • The Alabama Department of Revenue
Costa County, Yolo County, and Tuolumne County. Other projects stations along the coast through USM's Gulf Coast Geospatial received a $1.77M grant in FY04 and $1.77M
Center at the Gulf Coast Research Laboratory (GCRL). in FY05 for Height Modernization efforts in
underway include: Louisiana • Higher accuracy in data on land elevations and to relate Alabama.
- Northern California Densification, a cooperative project with the • Louisiana State University received $800K grant in FY02 to establish the Louisiana Spatial
California Department of Transportation (reobservation of 800 to 900 those measurements to changes in sea level in the Gulf of • GPS observations, technology transfer, and
Reference Center (LSRC) to address the state’s geospatial needs.
passive geodetic stations in Northern California), Mexico. cooperative efforts among neighboring states
• The LSRC has since received $400K in FY03, $440K in FY04 and $440K in FY05.
- Yolo County (new project of 65 stations), and • In May 2005 NOAA and USM inaugurated a new tide and with similar issues such as Mississippi and
• Priorities include development of a network of high precision, continuously operating GPS
- Glenn County (subsidence monitoring project). water level station at the GCRL in Ocean Springs -- the first Louisiana will expedite the development of
reference stations and development of a Vertical Time-Dependent Positioning (VTDP) model to
• The CSRC determined NAVD88 heights on 20 California CORS on the Gulf Coast that is co-located with a GPS system based the Height Modernization Program in the Gulf
address the dynamic vertical control issues caused by subsidence.
through conventional leveling and GPS surveys. CORS. of Mexico region.
• In May 2005 NOAA officially released NOAA Technical Report 50: Rates of Vertical
• In Orange County, Riverside County (Metropolitan Water District), San • Applications supported by linking a CORS station with a • Through a voluntary effort supported by
Displacement at Benchmarks in the Lower Mississippi Valley and the Northern Gulf Coast, South Carolina
Diego County, and Parkfield users can access a “real-time” CORS long-term water level station include: long-term subsidence private and local agencies, Alabama has re-
an analysis of historical leveling observations used to compute rates of subsidence and help •The South Carolina Geodetic Survey received
network (one to two-second latency) for their dynamic positioning needs. measurement, relative sea level trends assessment, storm observed their basic geodetic network as a
identify “reliable” survey marks for control purposes. grants of $400K in FY03 and $440K in FY04 for
• The CSRC is also developing the Pocket GPS Manager (PGM), a set surge monitoring from hurricanes and other coastal storms, starting point for the HMP program.
•GPS and leveling surveys conducted along major evacuation routes in coastal Louisiana to determine up-to-date elevations of the roadways Height Modernization efforts in South Carolina.
of platform-independent software designed for handheld PDAs to • Evacuation route profiles were measured using a new technology, the Applanix POS LV blended navigation system. NGS is conducting a proof-of-
shoreline change and habitat restoration. • This massive effort involved over 120
replace hand-written field logs used in GPS campaign surveys. • In December 2003, a Height Modernization User Forum was geodetic points in Alabama and neighboring • Although the Geodetic Survey of South
concept study to develop techniques and specifications for applying this technology to the problem of route surveying.
• CSRC providing assistance to the UNAVCO Plate Boundary held in Biloxi. states. Carolina did not receive Congressional funding
• In 2004 GPS observations performed on monumented VTDP control points throughout the southern parishes.
Observatory project. • Technology transfer and cooperative efforts among • Plans underway to establish additional in FY05, South Carolina continues to use HMP
• As the first state in the Gulf of Mexico region to implement the Height Modernization Program, Louisiana provides technical assistance and leadership
neighboring Gulf states with similar issues will expedite the CORS as a part of the HMP. guidelines and survey procedures to improve the
to neighboring Gulf States.
development of the Height Modernization Program in the Gulf • Three Height Modernization Forums have National Spatial Reference System in a mapping
• Outreach and education activities include a Louisiana Elevations Workshop held in New Orleans in January 2005, a GIS Height Modernization Forum in
of Mexico region. been held (two in 2005 and one in 2003). partnership with counties throughout the State.
Shreveport in October 2004, a Louisiana Height Modernization Summit and Regional Coordination Meeting in Baton Rouge in June 2004.
• Plans underway for adding additional CORS. • Map shows counties (in blue) with completed
• LSRC, NGS and NOS representatives involved in hurricane response efforts.
• Future activities include a large project in the Coastal region HMP surveys. Surveys are underway in other
• LSRC and NGS personnel present seminars and overviews to the surveying community, Federal, state, and local agencies and governments.
of Mississippi to further develop support for the HMP. counties (in red).
For more information, contact Juliana Blackwell at firstname.lastname@example.org or visit www.ngs.noaa.gov/heightmod/ National Geodetic Survey, National Oceanic and Atmospheric Administration