Getting location and acceleration information

I am developing an iPhone App in which I have to get the acceleration and deceleration with which user is moving. Actually this App will work as a chronometer. How can I get the latitude and longitude anh how can I calculate the accelerati开发者_StackOverflow社区on and deceleration. Any sample code or information link will be better. Thanks

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Have a look at MapKit for Location.

Also UIAccelerometer for movement

Edit

Have a look at Core Location which lets you do things with headings and speeds using your location.