2. The method of claim 1 , wherein the processing further comprises: correlating the first and second roads with stored information to identify first and second route links associated with corresponding ones of the first and second roads; determining whether the first road intersects the second road; and constructing a portion of the routing graph that includes the identified route links when the first and second roads intersect, the identified route links being connected within the routing graph by a corresponding one of the nodes.
7. The method of claim 2 , further comprising: discarding the second data element when the first and second roads are not directly connected; identifying an additional data element from the received positional information; and selecting a second road associated with the additional data element.