RTK corrections in Washington State
RTK Premium delivers network RTK corrections in Washington State in NAD83(2011), epoch 2010.0, over standard NTRIP. In a fixed solution it reaches 1 to 2 cm horizontally and under 3 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 Washington State
| Coverage | The coverage map shows networks over nearly all of Washington State by area (99%); check your site for 1 network or 2+ networks |
|---|---|
| Frame | NAD83(2011), epoch 2010.0; ITRF on request |
| Accuracy | 1 to 2 cm horizontal, under 3 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, 00:00 to 14:00 Pacific 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 Washington State
Washington crews choose between the state's reference network, commercial network RTK, crowd-sourced base stations, satellite-delivered corrections and their own base.
| Type | Typical operator | What to check |
|---|---|---|
| State reference network | A cooperative of public and private infrastructure partners; real-time access goes to partners and to subscribers who pay an annual fee. | Partner or subscriber terms, coverage near your sites, whether an availability commitment is published, and support hours. |
| 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 Washington connection, and ITRF on request. Washington uses two State Plane zones under NAD83: North and South. 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 Washington State
Farmland: Washington had 31,800 farm operations on 13,800,000 acres operated in 2024. Orchards, row crops and dryland wheat all run auto-steer and guidance that need a correction holding pass after pass. (USDA NASS, State Agriculture Overview, 2024)
Highways: The state highway system covers 7,051.63 centerline miles and 18,774 lane miles. Paving, widening and bridge work on it are staked and checked to the centimeter. (Washington State DOT, 2025)
Ports: The Northwest Seaport Alliance ports of Seattle and Tacoma handled 3,340,733 TEUs in 2024. Terminal paving, crane rails and yard layout are set out from surveyed control. (Northwest Seaport Alliance, 2024)
Hydropower: Washington supplied 26% of total US conventional hydroelectric generation in 2025. Dam safety monitoring and transmission corridor work rely on precise positions and heights. (U.S. Energy Information Administration, 2025)
Questions about RTK in Washington State
Which RTK correction service serves Washington State?
RTK Premium serves Washington State 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 Washington?
Washington's reference network is a cooperative of public and private infrastructure partners. Its static data is free, while real-time access goes to partners and to subscribers who pay an annual fee. Check its coverage near your sites and what it commits to on availability and support.
How much does RTK cost in Washington?
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 Washington?
RTK Premium delivers NAD83(2011), epoch 2010.0, with ITRF on request. Project the coordinates into the Washington State Plane zone for your site, North or South.
Does tree cover affect RTK in Washington?
Dense canopy blocks and reflects satellite signals, so a fix is slower to come and easier to lose under heavy forest. Measure from openings where you can, and check a known point after any drop.
Do I need my own base station in Washington?
No. Network RTK builds the correction for your position from the surrounding stations, so there is no base to set up, survey or guard.
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 Washington State
Run the 14-day trial at your own Washington sites, in your own State Plane zone, before you commit to a plan.
