"We actually get 13 billion points of data every month from people who are driving the roads, and because we can see where people are driving, we can see where there are changes in the road network."
The result is the rich mixture of information that makes up the mapping services available from your cellphone.
Nokia has just opened up its mapping platform to non-Nokia smartphones. Its mapping data is shared throughout Windows Phone 8 handsets and the company hopes to attract Apple users with a soon-to-be-launched app for its Here.com service. Nokia is also making the platform available to other phone makers under a license.
Martyn Williams covers mobile telecoms, Silicon Valley and general technology breaking news for The IDG News Service. Follow Martyn on Twitter at @martyn_williams. Martyn's e-mail address is email@example.com