Illinois Height Modernization: Monuments, CORS, and RTK Networks

Web resources for land survey monuments and benchmarks, Continuously Operating Reference Stations (CORS), and Real Time Kinematic (RTK)) Networks in Illinois. These resource lists are incomplete, contact us with additional links. Some links lead to resources made available by commercial entities.

NGS CORS using Google Maps.

Image credit: Geocaching.com. Details for Benchmark: LC0155

Image credit: DuPage County Cooperative CORS Network for DP1A.

Land Survey Monuments in Illinois

NGS Datasheet Page

Find a Survey Mark

USGS Survey Benchmark Information

Not yet available on the Internet.

Geocaching Benchmark Benchmark Hunting

Geocachers track down and photograph benchmarks; search by zip code or Point ID.

HubTack, Inc. Survey Records On-Line

Includes Illinois monument records, GLO Notes, GLO Plats, and County Survey records.

DuPage County Geodetic Control Resources

DuPage County, Illinois Geodetic Vertical Control Network(Map)

Kane County Geodetic Monuments

Aurora, IL City Benchmarks

Aurora City Benchmarks (Map and all Control Monuments)

City of Naperville Land Suvey Monuments

City of Naperville: Survey Monument Locator (Map)

West Chicago Survey Control Network

Horizontal Monument Location Map

Vertical Monument Location Map

CORS in Illinois

National Geodetic Survey Cooperative CORS

NGS CORS Using Google Maps

NGS CORS Network Map

DuPage County Cooperative CORS Network

MoDOT: Missouri Department of Transporation

Illinois Stations related to St. Louis area

Real Time Kinematic (RTK) Networks in Illinois

KARA Company CPRS Sites Information

Coverage throughout Illinois

Seiler Instrument Company: Midwest RTK Network

St. Louis and Indianapolis networks cover south-central Illinois

Trimble VRS now - USA Illinois Coverage Map

Coverage for northern Illinois