Places along a route: POST /places/along

POST /places/along returns places of a category within a radius of a route, sorted by how far along it they are. Each result carries its distance off the route and how far along it is, and one request is one metered call.

• POST /places/along finds places within a few metres of a route, sorted by how far along it they are, using the geometry a /route response carries as route.
• Each place carries distance, in metres off the route, and along, in metres from the start.
• route takes 2 to 2,000 coordinates, at most 100 km, with every coordinate in Canada; category takes up to 8 ids; radius is clamped between 10 and 500 metres.