MaineDOT CORS

Price and plans

Not published by the operator: free trial, discounts / exemptions, what's included.

Coverage

Where it works

State-run network for Maine.

Stations

Not published; the public sourcetableSourcetableThe 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: NTRIPNTRIPThe standard way RTK corrections are sent over the internet. Think of it as internet radio for correction data.Full definition needs internet at the roverRoverThe 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.

Not published by the operator: official coverage map.

Connection settings

NTRIP caster

Confirmed live: a public sourcetable request to medotrtn.maine.gov:2101 answered on Oct 17, 2026 with 8 mountpoints.

Mount types

VRSVRSVirtual 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 GGAGGAA 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 NMEANMEAA 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.

Not published by the operator: correction formats, satellites (constellationsConstellationOne family of navigation satellites, like GPS, GLONASS, Galileo or BeiDou. More constellations means more satellites to use.Full definition), datumDatumThe starting point and ruler that coordinates are measured from. The same spot has different numbers in different datums.Full definition / epochEpochOne moment of GPS measurement. A receiver logging at 1 Hz records one epoch every second.Full definition / geoidGeoidA lumpy, imaginary "sea level" surface around the whole Earth. Elevations are measured from it.Full definition, accuracy, receivers that work.

Sign-up steps

1. Register a self-service account at medotrtn.maine.gov
2. Logins are case-sensitive
3. Old mdotcors accounts ended Oct 1, 2025; old users must re-register

Sign-up page

Go to sign-up →

Not published by the operator: how long approval takes, who can sign up.

Fine print

Support

[email protected]

Last checked

Oct 17, 2026

Not published by the operator: terms / user agreement, system status page.