Patent ID: 7532978

Claim:
A method for providing information to a remote unit for guiding a user of an off-board vehicle navigation system along a recommended route, the method comprising: receiving, at a supply location prior to any calculation of the route, a request from a remote unit for a route to a destination and a desired category representing a plurality of closely related points of interest; calculating a recommended route to the destination in relation to the desired category on a database of roads and categories located at the supply location; filtering the database to provide a filtered map area including the recommended route and a point of interest among the plurality of closely related points of interest; receiving, at the supply location, information from the remote unit defining a width substantially perpendicular to the recommended route or a perimeter around each of a plurality of nodes along the recommended route; determining, at the supply location, sizing of the filtered map area in response to the width or perimeter information; and transmitting the filtered map area to the remote unit.