OpenStreetMap

seichter has commented on the following diary entries

Post When Comment
6th post - undergraduate geography dissertation about 6 years ago

Another point I want to mention: You have three tracks with maybe different GPS hardware. This tends to be much more reliable than one track with occasional offsets. This can be excludeded by majority votes. If you lose connection with all three sensors (e.g. in buildings), the recorded (false) positions will not coincide.