how to get Route directions between two points on a map to draw driving directions?

Question

is there a way to use core location or google or some other api to provide two points on the map and get the resulting set of latitude/longitude pairs for the route?

i have seen in this tutorial Drawing polyines or routes on a MKMapView that how to draw driving direction using core graphics...but in the sample code it has route.csv which has predefined set of longitudes and latitudes.....how do i make pair of longitudes and latitudes so that i can draw driving directions.

Answer 1

Companies invest millions of dollars into developing routing algorithms, so I very much doubt that you'll be able to get it for free anywhere (I'm happy to be wrong, though). For example, the Google Maps JavaScript API supports routing, so I guess you could hack that up. The results wouldn't be fast or pretty, mind you.