RTK corrections in Illinois
RTK Premium delivers network RTK corrections in Illinois in NAD83(2011), epoch 2010.0, over standard NTRIP. In a fixed solution it reaches under 1.5 cm horizontally and 2.5 cm vertically. It costs $900 per device per year, or $690 for RTK Core on a single network, and a 14-day free trial comes first.
RTK Premium in Illinois
| Coverage | The coverage map shows networks over the whole of Illinois by area; check your site for 1 network or 2+ networks |
|---|---|
| Frame | NAD83(2011), epoch 2010.0; ITRF on request |
| Accuracy | Under 1.5 cm horizontal, 2.5 cm vertical, in a fixed solution |
| Service level | 99.9% monthly availability for RTK Premium where the coverage map shows an Eligible Area |
| Trial | 14 days on your own receiver; your account arrives by email within two working hours |
| Price | In the US, RTK Premium costs $900 per device per year, RTK Core $690 and RTK Access $350, excluding sales tax. Monthly plans run from $39 to $100. |
| Support | Business days, 02:00 to 16:00 Central Time (09:00 CET to 17:00 ET) |
| Stream | RTCM 3.x over NTRIP; caster rtkpremium.xyz, port 2101, mountpoint COMMON |
Check it before you commit
Setup guides
More than 100 step-by-step guides cover receivers, controllers, drones and machine control.
Test it yourself
RTKTEST.com compares up to three correction services against a surveyed point in one 15-minute session, and the 14-day trial runs on your own receiver at your own sites.
Correction services in Illinois
Illinois crews choose between commercial network RTK, crowd-sourced base stations, satellite-delivered corrections and their own base, and the state DOT is building a statewide reference network.
| Type | Typical operator | What to check |
|---|---|---|
| State network | The state DOT, building a statewide reference network that it plans to open to public users in 2027. | When registration opens, who is eligible, coverage near your sites, and whether an availability commitment is published. |
| Commercial network RTK | A private provider with stations across several states. | How many correction sources serve your area, the published service level and its remedy, and the term. |
| Crowd-sourced network | Independent owners hosting single base stations. | Distance to the nearest base, station uptime, and how each base was surveyed. |
| Satellite or state-space (PPP-RTK, SSR) | A provider broadcasting an error model without a local base. | Convergence time, accuracy and vertical performance. |
| Your own base | Your crew, on a surveyed point. | The survey of the base point, range, and the time spent setting it up and guarding it. |
Coordinates and heights
RTK Premium delivers NAD83(2011), epoch 2010.0, on every Illinois connection, and ITRF on request. Illinois uses two State Plane zones under NAD83: East and West. Set the project, the controller and the correction service to the same frame and zone before the job starts.
Setup
- Start the 14-day free trial on this site, or order a subscription. Your account arrives by email within two working hours.
- Enter the caster rtkpremium.xyz, port 2101 and mountpoint COMMON in your controller or receiver, with the username and password from your account.
- Measure a control point you trust before the job starts, and compare the result with its published coordinates in your project's frame.
Industries using precise positioning or RTK corrections in Illinois
Farmland: Illinois had 69,600 farm operations on 26,100,000 acres operated in 2025. Planting, spraying and auto-steer on that land depend on a correction that holds pass after pass. (USDA NASS, State Agriculture Overview, 2025)
Corn and soybeans: Illinois produced 2,343,300,000 bushels of corn for grain and 639,375,000 bushels of soybeans in 2025. Yield maps and variable-rate seeding are only as good as the positions behind them. (USDA NASS, State Agriculture Overview, 2025)
Roads: Illinois had 146,034 miles of public road in 2024, 96,345 of them rural. Resurfacing, widening and drainage work on those roads is staked and checked against design. (FHWA, Highway Statistics, Table HM-10, 2024)
State highways and bridges: Illinois has 15,969 miles of state highways and 7,847 bridges, and 2,185 interstate miles serve the state. Interchange rebuilds and bridge decks on that system are set out from surveyed control. (Illinois Department of Transportation, accessed Nov 2026)
Power plants: Nuclear was the primary energy source for electricity in Illinois in 2024, and the state's power plants had a net summer capacity of 46,279 megawatts. Plant sites, substations and transmission routes are laid out from surveyed points. (U.S. Energy Information Administration, 2024)
Questions about RTK in Illinois
Which RTK correction service serves Illinois?
RTK Premium serves Illinois with network RTK in NAD83(2011), epoch 2010.0. The coverage map shows where 1 network and where 2+ networks serve a site.
Is there a free RTK network in Illinois?
The state DOT is building a statewide reference network with real-time corrections, and it plans to open registration to public users in 2027. Until then, check what each available source commits to on availability and support before you rely on it for paid work.
How much does RTK cost in Illinois?
RTK Premium costs $900 per device per year, RTK Core $690 and RTK Access $350, with monthly plans from $39 to $100, excluding sales tax.
Which reference frame and zone do I use in Illinois?
RTK Premium delivers NAD83(2011), epoch 2010.0, with ITRF on request. Project the coordinates into the Illinois State Plane zone for your site, East or West.
Do I need my own base station?
No. Network RTK builds the correction for your position from the surrounding stations, so there is no base to set up, survey or guard.
How accurate is RTK in Illinois?
In a fixed solution under good conditions, RTK Premium reaches under 1.5 cm horizontally and 2.5 cm vertically.
Can I try it before I buy?
Yes. The 14-day free trial runs on your own receiver and needs no payment.
Last updated: 7 November 2026
Try RTK Premium in Illinois
Run the 14-day trial at your own Illinois sites, in your own State Plane zone, before you commit to a plan.
