Meridian's indoor GPS technology has been the sole preserve of companies prepared to build their apps from inside Meridian's custom editor. Now, however, it's opened up the platform, introducing a pair of SDKs that let use anyone use its coveted Nav Kit and Blue Dot know-how to help people get around cavernous public spaces. Tested in locations like Miami Children's Hospital, Sydney Airport and Macy's, users will be able to get turn-by-turn directions to help them find their gate, offspring or this season's must-have look -- with the latter the first to launch a mobile app built with the technology.