State-run network
Free
Maine DOTDepartment of Transportation. The state agency that runs many of the free state RTK networks.Full definition
Good to know: Fees waived for Maine residents and businesses; out-of-state fee not published
Where it works
1 stateState-run network for Maine.
All plans
| Plan | Price | Term |
|---|---|---|
| Access | Fees waived for Maine residents and businesses; out-of-state fee not published |
Coverage
- Where it works
- State-run network for Maine.
- Stations
- Not published; the public SourcetableThe list of every mount point a caster offers. Your app shows it when you connect without picking one.Full definition listed 8 mountpoints on Oct 17, 2026 (network products plus any single-station streams)
- Needs cell signal?
- Yes: NTRIPThe standard way RTK corrections are sent over the internet. Think of it as internet radio for correction data.Full definition needs internet at the RoverThe receiver that moves around the job, like a survey pole or a drone. It uses the base's corrections to find its exact spot.Full definition (cell data or a phone hotspot). General rule, not an operator statement.
Connection settings
NTRIP caster
hostmedotrtn.maine.gov
PortA number that tells your device which "door" on the caster server to use. For NTRIP it's often 2101.Full definition2101
mountsVRS_CMR, VRS_RTCM, VRS_RTCM_23, SingleStation_Nearest_CMR_PLUS, SingleStation_Nearest_CMRX, SingleStation_Nearest_RTCM_MSM, SingleStation_Nearest_RTCM23, VRS_CMRx
Confirmed live: a public sourcetable request to medotrtn.maine.gov:2101 answered on Oct 17, 2026 with 8 mountpoints.
- Mount types
- VRSVirtual reference station. The network blends nearby stations to create a pretend base right next to you, which keeps the baseline short.Full definition (network) and single station
- Must send GGAA short message your rover sends with its rough location. VRS and nearest-station streams need it to know where you are.Full definition position?
- Yes for VRS / network / nearest-base mountpoints (your rover must send its position as an NMEAA common text format GPS receivers use to report position and status. GGA is one NMEA message.Full definition GGA message). General rule based on the mount types.
Sign-up steps
- Register a self-service account at medotrtn.maine.gov
- Logins are case-sensitive
- Old mdotcors accounts ended Oct 1, 2025; old users must re-register
- Sign-up page
- Go to sign-up →
Fine print
- Support
- [email protected]
- Last checked
- Oct 17, 2026
Non-Maine users may have to pay. maine.gov blocked or timed out on our fetch.
States covered1
Not listed by the operator: free trial, discounts, what's included, a coverage map and a few other details. Ask them before you sign up if these matter to you.
No user reliability reports yet. Used it in the field? Tell us how it went.