i want to know how accurate our gps on iphone 4/4S because my new project is using gps for tracking something. i mean accurate is about meter. I have search other question like mine but i don't have the answer. Is it possible to track radius just say for 1 meter? how long accuracy that the gps iphone 4/4s have (in minimum)? 10 meter? how about 1 meter? can it track for 1 meter radius? oh again, my next project for my company is outdoor application. I know i can test it by myself but it more quick to get the answer from here. thank you.
The simple answer is: No, it's not accurate down to 1m.
In some cases though it is, but don't count on it. In an urban landscape I've sometimes been displaced by about 20m. but it seems like all devices gets the same displacement, so you can detect if they are close or not.
Edit: I should say that I have worked a lot with the location services on the iphone, so I'm absolutely sure of this answer.