Green Elk Blog


To create structure in the chaos of personal GPS recordings, we propose the following entities:
Three core concepts: Point, Trackpoint, Track; three supportive concepts: Placemark, Placetype, Activity;
two collections: Places and Tracklist; two deduced entities: Segment and TrackCache. We also address
complications involving tracks: timezones, multi-activity tracks, multiple recordings of the same adventure, user errors and measurement errors.