Here's a train journos should get on, m'thinks, because of its
long-term value, implications and potential for synergy.

http://openstreetmap.org/ --- OpenStreetMap is a free editable map of
the whole world. It is made by people like you. OpenStreetMap allows
you to view, edit and use geographical data in a collaborative way
from anywhere on Earth. OpenStreetMap's hosting is kindly supported by
the UCL VR Centre and bytemark.

-- tj