BTW all cellular devices are recorded as they move through tower locations while they are on and police don't feel they need a warrant for such data, so your location is pretty much available without that file.
Earlier, entities recording: cell company. Earlier, entities with access: police, cell company
Now, entities recording: cell company, Apple Now, entities with access: police, cell company, anybody who temporarily gains access to my phone, anybody who temporarily gains access to my iTunes computer
See, how the "attack surface" is dramatically bigger now?
I'm just saying keep in mind this info is also available to others without an iphone.