RTK corrections in Maine
Free 25 options · MaineDOT CORSContinuously Operating Reference Station. A permanent GPS receiver that records satellite data all day, every day.Full definition · Maine DOTDepartment of Transportation. The state agency that runs many of the free state RTK networks.Full definition · 1 regional/private network(s)
Compare all 25 RTK options in Maine
Every way to get RTKReal-time kinematic. A way to make GPS accurate to about an inch by getting live corrections from a nearby base station.Full definition CorrectionsLive info from a base station about how far off the satellite signals are, so your rover can cancel out the error.Full definition here, side by side: the state network, regional or private networks, and nationwide services. Tap a name for the full details page. Want to know about one exact spot? Check an address or ZIP →
| Option | Access | Price | Free trial | Caster | Mount types | Checked |
|---|---|---|---|---|---|---|
| MaineDOT CORS State-run network | Free | Fees waived for Maine residents and businesses; out-of-state fee not published | — | medotrtn.maine.gov:2101 | 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 | 2026-10-17 |
| KeyNetGPS Regional private | Paid | $375 per 30-day subscription; yearly from $3,135 (net 30) or $275/mo ($3,300/yr) | — | vrs.keynetgps.com:2101 | Not published | 2026-10-17 |
| Point One Navigation Polaris Commercial network | Paid | Virtual RTK $42/mo per license (~10 cm); True RTK $125/mo per license (1-3 cm); annual discounts | 14 days, no credit card required; includes Virtual RTK or Tr | polaris.pointonenav.com:2101 | Not published | 2026-10-17 |
| GEODNET RTK Community network | Paid | $40/mo or $400/yr per device | Free RTK trial offered (link on store page) | rtk.geodnet.com:2101 | Nearest single base | 2026-10-17 |
| RTKdata Commercial network | Paid | $40/mo, $400/yr, or $1,920 for 5 yrs per device | 30 days, full service, no credit card, no auto-renew | rtk.rtkdata.com:2101 | Nearest single base | 2026-10-17 |
| E38 RTK Premium Reseller | Paid | From $100 (shortest term; see page for durations) | — | rtkpremium.xyz:2101 | Not published | 2026-10-17 |
| Emlid Corrections Commercial network | Paid | 1 yr included with eligible Reach receivers; top-up $699/1 yr or $1,199/3 yr per device (via E38) | — | Not | Not published | 2026-10-17 |
| u-blox PointPerfect Flex Commercial network | Paid | From $5.90/mo (up to 100 hrs); 30-day free trial | 30-day free trial (u-blox and non-u-blox receivers) | ppntrip.services.u-blox.com:2101 | Not published | 2026-10-17 |
| Swift Navigation Skylark Commercial network | Paid | From $69/mo (1 cm RTK) or $29/mo (sub-decimeter RTK-SSR) per ArduSimple | 14 days | na.l1l2:2101 | Not published | 2026-10-17 |
| Leica (HxGN) SmartNet Commercial network | Paid | Not published | — | <state:9301 | iMAX network, nearest single base | 2026-10-17 |
| Trimble VRS Now Commercial network | Paid | Not published | — | www.vrsnow.us:2101 | Not published | 2026-10-17 |
| Topcon Topnet Live Commercial network | Paid | $1,800 new US subscription (Topcon store); monthly/project terms via dealers | — | After signup | Not published | 2026-10-17 |
| Carlson SkyNet RTN Commercial network | Paid | $1,500/yr; 14-day free trial | 14 days | After signup | Not published | 2026-10-17 |
| RTK2GO Free community CasterThe internet server that hands out correction streams. Your rover logs in to it, like tuning into a radio station.Full definition | Free | Free community caster; no quality guarantees | — | rtk2go.com:2101 | Not published | 2026-10-17 |
| NOAA NGS CORS Post-processing data | Free | Free post-processing data (RINEXA standard file format for raw GPS data. Any brand of receiver or software can read it.Full definition); not a real-time RTK service | — | Not | Not published | 2026-10-17 |
| Onocoy Nationwide / community | Paid | $20 per 30 days + $0.15/hr used | — | clients.onocoy.com:2101 | Nearest single base | 2026-10-17 |
| EarthScope NOTA real-time streams Nationwide / scientific | Free | Free for non-commercial use; commercial license required | — | ntrip.earthscope.org:2101 | Single base (you pick a station) | 2026-10-17 |
| Emlid Caster Free relay for your own base | Free | Free (relay for your own Base stationA GNSS receiver sitting still on a known spot. It figures out how wrong the satellite signals are right now and shares that as corrections.Full definition) | — | caster.emlid.com:2101 | Your own base (single base) | 2026-10-17 |
| Trimble CenterPoint RTX Nationwide / satellite PPP | Paid | $1,150/yr (US dealer listing) | — | Not | PPP (RTX), delivered by L-band satellite or internet | 2026-10-17 |
| Trimble Catalyst Nationwide / subscription GNSSGlobal Navigation Satellite System. The general name for GPS (USA) and the other satellite systems like GLONASS, Galileo and BeiDou.Full definition | Paid | $455/mo per user (dealer listing) | — | Not | Not published | 2026-10-17 |
| NovAtel TerraStar Nationwide / satellite PPP | Paid | Not published (dealer quote) | — | sid-output.com:2101 | PPP corrections by L-band satellite or internet | 2026-10-17 |
| John Deere RTK Ag network (dealer) | Paid | Not published (dealer); forum reports ~$1,250-$1,500/machine/yr | — | Not | Not published | 2026-10-17 |
| Case IH AFS RTK+ Ag network (dealer) | Paid | $838.10/yr (dealer listing) | — | After signup | Not published | 2026-10-17 |
| New Holland PLM RTK+ Ag network (dealer) | Paid | Not published (dealer subscription) | — | After signup | Not published | 2026-10-17 |
| IGS real-time streams (IGS-IP / BKG) Scientific network | Free | Free (registration required) | — | igs-ip.net:2101 | Single global stations (raw data) and SSR products for real-time PPP | 2026-10-17 |
| NOAA CORS (NCN) | Free Post-processing only | Free | — | No caster (download files) | Post-processing (RINEX) | — |
MaineDOT CORS
Free- Operator
- Maine DOT
- Access
- Free
- Price
- Fees waived for Maine residents and businesses; out-of-state fee not published
- Coverage
- Maine
NTRIP caster
PPK with NOAA CORS in Maine
NOAANational Oceanic and Atmospheric Administration. The US agency that includes NGS and runs the CORS network.Full definition's permanent base stations record satellite data all day and post it free. You can download those files and use them after a job to correct your drone or rover data (PPK), or to pin down your own base with OPUS. This is not live RTK. This state has 16 working station(s). Each NGSNational Geodetic Survey. The part of NOAA that runs the official US coordinate system, CORS and OPUS.Full definition site log has the station's name and details.
| Station ID | Lat, Lon | NGS links |
|---|---|---|
| BARH | 44.3950, -68.2217 | Coordinates · Site log |
| MECC | 44.8259, -68.7441 | Coordinates · Site log |
| MEDX | 45.0264, -69.2970 | Coordinates · Site log |
| MEFK | 47.2488, -68.5920 | Coordinates · Site log |
| MEFR | 44.6747, -70.1318 | Coordinates · Site log |
| MEGO | 43.6811, -70.4510 | Coordinates · Site log |
| MEGR | 45.4637, -69.5936 | Coordinates · Site log |
| MEJD | 44.6083, -69.5999 | Coordinates · Site log |
| MELI | 45.3637, -68.5074 | Coordinates · Site log |
| MEMA | 44.7099, -67.4583 | Coordinates · Site log |
| MEOW | 44.2961, -69.7454 | Coordinates · Site log |
| MEPI | 46.6708, -68.0168 | Coordinates · Site log |
| MERA | 44.9737, -70.6530 | Coordinates · Site log |
| MERO | 44.1138, -69.1187 | Coordinates · Site log |
| MESP | 44.2184, -70.5131 | Coordinates · Site log |
| MEWA | 44.4542, -69.0971 | Coordinates · Site log |
- Download: daily RINEX files (a standard GPSThe US satellite navigation system. People often use "GPS" to mean all satellite positioning.Full definition file type) at
geodesy.noaa.gov/corsdata/rinex/YYYY/DDD/ssss/or the AWS mirror. Custom time spans are available from UFCORS. - How often it records: after 30 days, NGS thins daily files to one reading every 30 seconds. Full-rate data is available from NOAA NCEI CLASS.
- Set your own base: OPUS. See our OPUS how-to.
Reliability reports
Collecting soonNo user reports yet for Maine networks. We only show real reports from real users, never sample data. Report collection opens soon, and here's what we'll ask:
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Quick answers
Is there a free RTK network in Maine?
Yes. MaineDOT CORS is listed as free. Check the operator's terms before you sign up.
How many RTK correction options are there in Maine?
FixFinder lists 25: 1 state-run network, 1 regional or private network(s), and 23 nationwide services.
How much does MaineDOT CORS cost?
Fees waived for Maine residents and businesses; out-of-state fee not published
What is the NTRIP caster for MaineDOT CORS?
The operator gives the caster address after you register. FixFinder has not found it published.