Cellphone tracking: Find an address? Easy. But new devices can calculate your altitude.

Craig Timberg reports:

Cellphones long have doubled as tracking devices, capable of revealing your location to police, paramedics, even grocery stores looking to deliver coupons to nearby customers. But there’s a measurement cellphones once struggled to make: altitude.

No more.

Read more on Washington Post.

Thanks to Joe Cadillic for this link.