Overview | Accomplishments | Regional Activities | Program Details | Contacts

Surveying a HTMOD passive mark. Photo: Wisconsin Department of Transportation
Wisconsin Height Modernization Program (WI-HMP) aims to provide real-time, sub 2 cm-horizontal and vertical positioning statewide through the establishment of accurate, reliable heights using global positioning satellite technology with traditional leveling, gravity, and modern remote sensing methods.
Two reliable, independent networks are necessary to make this accuracy possible. The Geodetic Control Network is a statewide framework of GPS stations and bench marks surveyed to provide the initial latitude, longitude and elevation. The active WISCORS Network is a series of statewide Continuously Operating Reference Stations spaced approximately 50 km apart to broadcast highly accurate real-time corrections. These real-time corrections are used in the field by many diverse user groups. WISCORS data can also be accessed for post processing field observations back in the office.

Continuously Operating Reference Stations play an important role in the HTMOD program. Photo: Wisconsin Department of Transportation
By 2015, Wisconsin expects to complete initial development efforts throughout the state. Initiatives are being implemented to ensure long-term perpetuation of both networks through a mark preservation program and continued education and outreach.
To report endangered or destroyed survey monuments and missing witness posts, please call (866) 568-2852 or email. Please include:
Iowa Real Time Network (RTN)
Minnesota Department of Transportation CORS (MNCORS)
Michigan Department of Transportation CORS (MDOT CORS)
National Geodetic Survey (NGS)
Trimble Navigation
University of Wisconsin - Madison, Geoscience Research (Professor Chuck DeMets)
Wisconsin CORS (WISCORS)
Wisconsin Satellite Imagery
Wisconsin State Cartographer's Office
Elliot Smith
WISCORS Network Administrator
866-568-2852 phone
WISCORS Network
Geodetic Control Network
Diane Arendt
Geodetic Specialist
866-568-2852 phone
WISCORS Network
Geodetic Control Network
Leonard Perfetti
Wisconsin Height Modernization Program Coordinator
866-568-2852 phone
WISCORS Network
Geodetic Control Network
Dept. of Transportation - Truax Center
Surveying & Mapping
3502 Kinsman Blvd.
Madison, WI 53704
For additional inquiries, contact the State Geodetic Advisor Program or the National Height Modernization Program directly. State geodetic advisors serve as liaisons between NOAA and regional or state organizations.