Implement waypoint averaging

Be-Prepared / Be-Prepared.github.io

Handy PWA filled with useful tools.

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Implement waypoint averaging #11

Closed fidian closed 3 months ago

fidian commented 3 months ago

The code to handle the math of averaging is already in the repository. Simply create a new screen, employ wake lock, show live information on the screen, and also maybe mention that dark mode would save battery because the screen must remain on.

fidian commented 3 months ago

Possibly useful:

https://www.gnss.ca/app_notes/APN-029_GPS_Position_Accuracy_Measures_Application_Note.html
https://stackoverflow.com/questions/1185408/converting-from-longitude-latitude-to-cartesian-coordinates
https://rbrundritt.wordpress.com/2008/10/14/conversion-between-spherical-and-cartesian-coordinates-systems/

fidian commented 3 months ago

During averaging, it is possible that the user is near ±180° longitude. Flipping positive to negative and back would average out to the wrong side of the world. Ensure longitude is always using the same sign and standardize whenever displaying. Depending on the method used, "using the same sign" might interfere with point collection near 0° longitude, which does not need this type of correction.