I am wondering what could be the reason (or at least where else I should take a look) that
map matcher with measurement sigma = 40m snaps point to Tower Node,
when measurement sigma = 30m provides correct snap to intermediate edge point.
I understand that with 40m tower node got caught and considered as a snap option. But why map matcher (HMM) chooses it instead of the closest result?
Attached are 2 map matching results for same sequence of points. Black points are mapping results. Green or red are original points.
How come that higher tolerance (measurement sigma) gives bad map matching results?
For investigation, I am attaching gpx file. Unfortunately, I cant test it against your API due to the subscription limit.
input.gpx (816 Bytes)