How does Google draw roads on the map?

Question

Google

They quite accurately draw even hypothetical routes, for example, paths trodden by people between houses, across a field, etc.

Machine learning is understandable. It is interesting to learn and read those chat, maybe there are articles about generating routes on the map.

Answer 1

Why are neurons there? Enough of the usual statistic.
We take a rectangle. We break it down into small ones. Choose a threshold.
We leave points where people often visit.
https://star-wiki.ru/wiki/Curve_fitting
Even with curves you shouldn't bother. Enough to approximate with pieces of straight lines.
The main thing is that there are enough gps tracks.