[OSM-dev] geocoding and reverse-geocoding APIs

[John Smith]

2009/9/18 Joe Richards <joefish75 at yahoo.com>:

> Does Cloudmade offer something like that, including something to determine
> the distance (as the person walks, or as the car drives) between two
> addresses?

You can cheat to calc the distance between points and use pythag, but
the greater the distance the greater the inaccuracy, which is why the
great circle distance formula exists.

http://en.wikipedia.org/wiki/Great-circle_distance