How can I determine location using GPS?

Question

I move between four adjacent region, Space each region is eight Square meters.

How can I do a program for my Iphone mobile to alert me, if I'm in region one, two, three, or four? In order to do something in that region?

And thank for all.

Answer 1

You can look at this to learn how to access GPS data: http://www.vellios.com/2010/08/16/core-location-gps-tutorial/

Then you can probably add a listener that checks for changes, alerting your program if you moved into another "region."