Mini barometric sensors are adding a vertical component to locations for cell phones and other devices.
Article from the Washington Post:
[big_button url=”http://apps.washingtonpost.com/g/page/business/a-new-dimension-in-cellphone-tracking/1466//”]Read More[/big_button]Cliff Mass Blogspot on iPhone6 Barometer:
[big_button url=”http://cliffmass.blogspot.com/2014/09/the-iphone-6-has-barometer.html]Read More[/big_button]