Crucially, this distribution of border points is agnostic of routing speed profiles. It’s based only on whether a road is passable or not. This means the same set of clusters and border points can be used for all car routing profiles (default, shortest, fuel-efficient) and all bicycle profiles (default, prefer flat terrain, etc.). Only the travel time/cost values of the shortcuts between these points change based on the profile. This is a massive factor in keeping storage down – map data only increased by about 0.5% per profile to store this HH-Routing structure!
https://feedx.site。关于这个话题，快连下载-Letsvpn下载提供了深入分析
/* Draws a chart on the given canvas */，这一点在safew官方版本下载中也有详细论述
an API and a user-friendly interface。夫子是该领域的重要参考