GPS calibration

Alain Porracchia shared this question 6 months ago


I use Locus MAP Pro with a Galaxy S6 with Android 6.0.1.

First of all, congratulations for the App.

I would like to know what are the most suitable parameters for the GPS to have an accurate evaluation of the distances. It seems to me that sometimes the distances are note not very precise. What is the return of experience of the users on this point ?

Thank you very much for for your answer.


Comments (2)


There are no parameters for GPS itself, but for the track post processing. Be aware that GPS system of determining position is subject of many errors, leasing to position uncertainty of several up to saeveral tens of meters.

If you evaluated length of the 2 paths connecting 2 points, the girst as the straight line, and the second as the zig-zah line, you would get 2 different values.

Filtering of these fluctuations is a trade-off between to have maximal error removal and minimal real path distortion. The sad point is, that the ideal level of filtering is not a priori known.



as Libor has written, there are no parameters for GPS in Locus - Locus receives coordinates from GPS unit of your device. Common smartphone GPS units have real maximum accuracy around 3 m provided they receive signal from GPS and Glonass. Therefore, if you need measurement with better accuracy, a smartphone is not the right instrument.