想到这几个问题:
1.地图里街道是用线段数组表达的么? 地图本身呢?
2.google map driving direction 是在服务器上算好送过来
还是在用户端计算的?
3.driving direction 是 shortest path 问题么?
s***n 发帖数: 176
2
not sure what exactly does google use but usually street data is just a
bunch of geometry objects that stored in spatial db.
it's calculated in server cuz only server has access to data.
essentially yes.
I don't think it is.
多
they can't. i don't know how often google updates its base map data but i
don't think they do it often cuz base map data is huge. well there is some
map that allows everybody to edit, check out openstreetmap.org
