OSM has a heatmap feature. Users can contribute tracks and feed into it:
https://wiki.openstreetmap.org/wiki/Heat_maps
Awesome! Thanks. I'll look into it.
Edit: hmmm I don't think I understand that wiki. Most of those are not the type of heatmap I was thinking of. I'll keep looking into it though.
alt Hacker News
Awesome! Thanks. I'll look into it.
Edit: hmmm I don't think I understand that wiki. Most of those are not the type of heatmap I was thinking of. I'll keep looking into it though.