Patent ID: 7433694
Filing Date: 2008-10-07
Classification: G01S,G06Q,G08G,H04W,Y10S

Abstract:
1. A database of Wi-Fi access points for at least one target area having a radius on the order of tens of miles, said database being recorded in a computer-readable medium and including database records for substantially all Wi-Fi access points in the target area, each record including identification information for a corresponding Wi-Fi access point and calculated position information for the corresponding Wi-Fi access point, wherein said calculated position information is obtained from recording multiple readings of the Wi-Fi access point at different locations around the Wi-Fi access point so that the multiple readings avoid arterial bias in the calculated position information of the Wi-Fi access point, and wherein the database records for substantially all Wi-Fi access points in the target area provide reference symmetry within the target area.