Patent ID: 7403762

Claim:
A method of locating Wi-Fi access points in a target geographical area to build a reference database of locations of Wi-Fi access points, comprising: deploying at least one vehicle including at least one scanning device having a GPS device and a Wi-Fi radio device and including a Wi-Fi antenna system; traversing the target area in a programmatic route to avoid arterial bias, said programmatic route including substantially all drivable streets in the target geographical area and solving an Eulerian cycle problem of a graph represented by said drivable streets; while traversing the target area, receiving the GPS coordinates of the GPS device; while traversing the target area, detecting Wi-Fi signals from Wi-Fi access points in range of the Wi-Fi device and recording identity information of the detected Wi-Fi access point in conjunction with GPS location information of the vehicle when the detection of the Wi-Fi access point was made; using said location information to reverse triangulate the position of the detected Wi-Fi access point; and recording the position of the detected access point in a reference database.