MINNESOTA / GNSS CORRECTIONS
MnCORS field guide
Use MnDOT’s registration and correction-stream information, then check the selected reference against your job.
Get set up
- Register using the user-management link on MnDOT’s network page. Follow the account instructions sent by the network administrator.
- Request a login for each simultaneously connected rover. Confirm the format supported by your equipment with its provider.
- Select the stream for the required reference. The FAQ distinguishes NAD83(1996) and NAD83(2011) mountpoints; its table pairs them with different geoid models.
- Keep the chosen mountpoint, horizontal reference and geoid model with your job notes. Corrections determine ellipsoid heights; project elevations need the appropriate height conversion or approved local calibration.
Source: MnDOT MnCORS FAQ and current mountpoint table. Use the current table rather than copying a stream name from an old job.
If the rover will not connect
Check cellular data, credentials, the selected stream and network notices. An available GNSS signal does not guarantee a working cellular connection. For receiver setup, start with your equipment provider; for network access, contact CORSVRS.DOT@state.mn.us. See MnDOT resources and contacts.
If the portal or map will not open
Return to the official network page for its current links and regional maps. If the user-management portal displays “Request rejected” or a blank map, contact network support for help with access.
Bring a consistent reference back to the office
Use the control-check and CSV/LandXML handoff checklist. A county or local design grid must agree with the exported survey before comparing elevations or computing volumes.
Do not change a mountpoint or geoid merely to make a discrepancy disappear. Check trusted control and resolve the project reference first.