Position information and Digital map recognition in NS2

Hi everybody,

I’m a new user in ns2. I want to simulate a my Vehicular ad hoc routing protocol that it needs each node (vehicle) in the network knows its own position (in theory, thanks to the use of GPS) and more important can determine the position of its neighboring juctions (in theory, though preloaded digital map). I know that should first generate mobility model via a traffic simulator like MOVE and then implement and simulate my routing protocol in ns2 to use that mobility model. But I don’t know how can introduce such position information and digital map to ns2 to find the appropriate path, because based on my knowledge, ns2 can recognize only nodes, not maps. Can a traffic simulator generate a digital map
output file that can be read and recognize by ns2?
If somebodies have information about doing that or know some resources that explained implementation of these problems, please help me. Thank you in advance,

Best regards,
Mojtaba Asgari