Welcome to

The Geodrift research project determines the accuracy of satellite based geopositioning systems under various conditions. We define 'Geodrift' as the deviations in the position measured.

A group of GPS receivers that determine the current coordinates typically display values that are many meters apart. This is also true when using the same GPS receivers from the same manufacturer. They can still show different positions for the same spot. Often a GPS Receiver canot measure reliably on which side of a creek or road it is currently located. Read more background information about Geodrift. 

Results of the research project will be published on this web page once we have collected enough data for comparison. Our goal is to show how various geopositioning equipment performed under real-world usage.

This project is made possible by the numerous voluntary contributors - the Geodrifters - that place and measure reference stations all over the world. On our Entry Help page you can read about how you can participate: how to make and enter a measurement. View the latest statistics or search for a station.

If you want to run a GPS reception quality and reliability test with your own device, read our track test page to get hints and instructions on how to run and visualize such a test. 

Have questions? Contact us to get the answers!