We have sets of rough coordinates for a few hundred road routes across the UK.
The waypoints along the routes are often 50 metres apart. This means that when we draw a line through the coordinates (our software limits us to straight lines) they sometimes cut across roads, buildings etc.
The plan is to create a PHP script that will run the coordinates through something which will return close, nicely placed road coordinates and insert them into our database, essentially replacing our spread out, 50 metre apart coordinates.
The only technology we've found that can do this is the Google Maps Directions API. If we pass the waypoints along the route, Google can in return give us perfect road route with the coordinates of each step on a particular leg/straight on the route.
We'd go ahead and do this now if we weren't uncertain about this being allowed.
https://developers.google.com/maps/faq
We have read through the Google Maps FAQ and can't find anything about caching the road coordinates. We don't want to do anything that would breach the terms of service as our application heavily relies on other Google APIs and Google Maps itself.
How should we continue? If this is breaking Google's terms of service, couldn't we just randomize the coordinates they return slightly so they're not the same? How could it be proved we've broken them then?
