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stadiamaps / ferrostar

A FOSS navigation SDK built from the ground up for the future
https://stadiamaps.github.io/ferrostar/
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Look at Kalman filtering to reduce GPS noise #23

Open ianthetechie opened 10 months ago

ianthetechie commented 10 months ago

Especially important for lower quality phones, but this can quite dramatically reduce noise even in fairly open skies on an iPhone! See https://mastodon.social/@_Davidsmith/111409340172869799.

This can be added to the NavigationController and be applied transparently. Probably should be configurable in case someone wants to disable it.

ianthetechie commented 6 months ago

As a side note, with Kalman filtering, we also get smoothed speed estimates "for free." So this is probably a prerequisite for anything related to speed in the app. (I say this is a prerequisite because, while we can get instantaneous speed from individual GPS readings that are fairly accurate, this is going to be pretty noisy.)

ianthetechie commented 3 weeks ago

@haysmike linked a great article in today's Ferrostar dev meeting: https://www.uber.com/en-CA/blog/rethinking-gps/