State-run network
Free
Indiana DOTDepartment of Transportation. The state agency that runs many of the free state RTK networks.Full definition
Good to know: No charge (user agreement required)
Where it works
1 stateState-run network for Indiana.
All plans
| Plan | Price | Term |
|---|---|---|
| Public access | Free (user agreement required) |
Coverage
- Where it works
- State-run network for Indiana.
- 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 136 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
host108.59.49.226
PortA number that tells your device which "door" on the caster server to use. For NTRIP it's often 2101.Full definition9000 network (MAX, iMAX, VRSVirtual reference station. The network blends nearby stations to create a pretend base right next to you, which keeps the baseline short.Full definition, MSM4); 7071 single sites
mountsRTCM3_MAX, RTCM3_IMAX, RTCM3_NEAR, RTCM2_IMAX, RTCM2_NEAR, CMR_NEAR, CMRP_NEAR, CMRP_IMAX, CMRP_IMAX(GNSSGlobal Navigation Satellite System. The general name for GPS (USA) and the other satellite systems like GLONASS, Galileo and BeiDou.Full definition), CMRP_NEAR(GNSS), MSM4_NEAR, MSM4_IMAX, MSM4_VRS, RTCM3_VRS … (136 in total)
Confirmed live: a public sourcetable request to 108.59.49.226:9000, 108.59.49.226:7071 answered on Oct 17, 2026 with 136 mountpoints.
- Mount types
- MAX, i-MAX (network), single station MSM4
- Correction formats
- RTCMThe common format RTK corrections are written in, so different brands can understand each other.Full definition 2.3, RTCM 3.1 (MAX/i-MAX), RTCM 3 MSM4
- 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
- Download and sign the InCORS RTKReal-time kinematic. A way to make GPS accurate to about an inch by getting live corrections from a nearby base station.Full definition user agreement
- Return it to INDOT
- INDOT sends the IP, port, username and password
- Sign-up page
- Go to sign-up →
- Who can sign up
- Anyone who signs and returns the INDOT RTK user agreement
Fine print
- Support
- Network admin 317.522.9771
- Last checked
- Oct 17, 2026
Operator says 'at no charge'.
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.