In our project we captured GPS-tracks from subjects in the timeframe of a year. In total we captured around 13000000 GPS-points this way. The captured data comes from an electric powered car and is accompanied by some Metadata (consumption, average loading time, speed, gear shift, brake state, ...). We want to prefilter the GPS-tracks before writing them into our Postgis database. We hope to reduce the scattering of our data without losing too much of our metadata. Our GPS-points are NMEA files. Does anybody have a list of methods I could look into?
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