self._crawl_detail(detail_url)
use in the utility and later finance industries. I don't think it's inaccurate
。爱思助手下载最新版本对此有专业解读
A. Preprocessing (Done by OsmAnd when new maps are prepared):
简单讲，要做L3，需要先做L2积累数据。那么要做L4，也一样依赖L3的数据。技术上他们是一脉相承的，不存在一口就能吃个胖子的技术路线。