[...] InMobi collected nearby basic service set identification addresses, which act as unique serial numbers for wireless access points. The company [...] then fed each BSSID into a "geocorder" database to infer the phone user's latitude and longitude
The author of this article might need a new technical advisor.
Other than "geocoder" being incorrectly written as "geocorder", it's correct. That's how the WiFi trilateration systems in cell phones used for determining location work; it's a simple DB lookup plus a small bit of math.
The author of this article might need a new technical advisor.