Hot answers tagged

10

GPS is simply not a good way to measure trail distance. This is because the raw GPS fixes have a lot of noise on them. If you take them literally, then you get a much longer distance than you actually moved. If you low pass filter them too much, you cut off corners and get a shorter distance. The usual algorithm is to apply some low pass filtering, but ...


8

There are two main things that can go wrong with gps accuracy. The first is the quality of the signal, which can be less than for a dedicated gps unit (less space for an antenna and other design compromises). Of course the question of how you carry it comes into play here (a low pocket isn't very good and this may be worse than with a dedicated unit ...


5

We have an article about this topic, since Gaia GPS users frequently ask - why GPS recording can be inaccurate. The short answer is, as others have said, GPS isn't perfectly accurate. If you compare a GPS measurement to a measurement from a measuring wheel, there will be a discrepancy in stat calculations, regardless of GPS chip or post-processing ...



Only top voted, non community-wiki answers of a minimum length are eligible