Google Maps links

[UKenGB]

Hi,

suggest to prepare a example URL without private data and post this URL here.

Here's a short link to a prepared route in Google Maps:-

http://goo.gl/maps/XeBjs

The full URL can be found once the page is open, but drop that long URL onto RC and only 4 waypoints are shown on the map as they're the only ones with co-ordinates. So how does Google ascertain their exact location from that same URL?