Re:Navtech data (Score 1)

However it is seems to be very cost effective getting the data right the first time and building these in the field with GPS units, that way they never have to come back to that stretch of road, unless there is an act of God or bulldozer. I think Navigation Technologies is the only company that actually does field verification. Mapquest, and Yahoo maps not only use Navtech data, but other companies as well and splice them together.