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A comment on Using Open Street Maps and Kalman Filters to Clean Up GPS Data. Parent comment

Re:Using Open Street Maps and Kalman Filters to Clean Up GPS... by arjun27 on Monday September 12, 2016 @01:49PM (#12481913)
Great question. It's a combination of gps data[1] and a lot of manual work. Mapbox for one has strong data teams running mapping initiatives[2].

[1] https://blog.openstreetmap.org/2013/04/12/bulk-gpx-track-dat... [2] https://github.com/mapbox/mapping/wiki

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