What is RTK?
A way to get more precise GPS positions.*
RTK is a positioning technique that can help a compatible GPS receiver locate a point to within a few centimeters in suitable conditions. It uses correction data from reference stations at known locations. A phone app connects to the receiver and shows the result. An RTK subscription alone does not improve your phone's built-in GPS.
What you need
A compatible RTK receiver, plus a phone or tablet running an app that can connect to it
A free or paid RTK correction service that covers your work area
An internet connection for corrections, through cellular data or a satellite internet connection
An open view of the sky, away from buildings and heavy tree cover
Where corrections come from
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Public networks
Many US states and agencies run networks of reference stations (CORS). Some are free after registration.
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Commercial networks
Subscription services with wide coverage.
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Your own base station
Set up a base at a known point and stream its corrections to your receiver.
Use your own account
Dipper Area Measure can connect to a correction provider using NTRIP, the standard way to send RTK data over the internet. Enter the connection details supplied by your provider, then select a correction stream or use the app's nearest-station option when supported by the network. You can find the technical settings in our setup guide.
What are RTK and NTRIP? A plain-language guide › Area Measure help center ›
Our RTK service
Our own correction subscription is planned, with pricing and coverage to be announced. Today, Dipper Area Measure can use a compatible receiver and an existing correction account. Check the provider's coverage, receiver requirements, and fees before signing up.
* Centimeter-level positioning requires a compatible RTK receiver, a correction service, an internet connection, and open sky. Results depend on the equipment and conditions. Phone GPS is typically accurate to a few meters; map tracing depends on the imagery and where you place points.