Regional Geospatial Service Center

Gravity Base Stations - Illinois


Reference Base Stations


NGA Reference Base Station Listing


Absolute, Absolute Excenter, Pendulum and/or Calibration Base Stations. Base Stations Information.



  • ANDOVER: IL route 81 near Interstate 74, Andover, IL (Base)
  • CAMBRIDGE CA: Outside of Cambridge Post Office, Cambridge, IL (Abs. Excenter)
  • CHICAGO C: Univ. of Chicago outside Ryerson Lab., Chicago, IL (Pend. Excenter/Nat'l)
  • GALVA: IL route 17, south of Galva, IL (Base)
  • GENESEO ROUND: Farm area SW of Geneseo, IL (Base)