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!
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，这一点在爱思助手下载最新版本中也有详细论述
「發生過一件如此不幸的事情再做住宅，你看外國有些地方也不會這樣做」，他又指程序繁複，清拆、處理業權等問題耗時很久，原址重建「不太實際」。
“Immigrants, just by showing up, they’re reducing the debt-to-GDP [ratio], and that’s a good thing for the country,” David Bier, Cato’s director of immigration studies and one of the report’s coauthors, previously told Fortune.