Apple has purchased a small Silicon Valley startup, WifiSLAM, that specializes in extending location data and positioning to indoor locations using Wi-Fi triangulation when GPS information is not available, according to the Wall Street Journal. The deal, worth $20 million, is expected to supplement Apple's Maps application and compete with Google's crowdsourced "Indoor Maps" project. Currently, the "Indoor Maps" project is limited to large-crowd locations such as airports, stadiums and shopping centers.
