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john22544 t1_j5rxtfx wrote on January 25, 2023 at 3:20 AM

Reply to comment by TommyTuttle in TIL that the European Union developed a satellite navigation system called Galileo, which can provide an accuracy of up to 20 cm (0.7ft) on smartphones, while GPS only reaches around 3 meters (10ft) by apeowl

If you have your own base station within a few miles of your job you can get repeatable sub 2 centimeter vertical accuracy.

Selective availability that intentionally limited the accuracy was turned off May 1, 2000.