MapView and dealloc IOS

Hello i have a mapView and i think it takes too much memory after leaving the mapView

here are my methods is anything missing?

- (void)viewDidUnload

{



    mapView.showsUserLocation = NO; b

    [mapView removeAnnotations:mapView.annotations]; 



    [super viewDidUnload];



}





-(void)dealloc{

    [name release];

    [type release];

    [address release];

    mapView.delegate = nil;



    [super dealloc];

}



- (void)viewDidLoad{

    foundLocation = location found <----   



    MKCoordinateRegion region;

    region.center.latitude = foundLocation.coordinate.latitude;

    region.center.longitude=foundLocation.coordinate.longitude;

    region.span.longitudeDelta=0.01;

    region.span.latitudeDelta=0.01;

    [mapView setRegion:region animated:NO];



    ann = [[MapAnnotation alloc]init];

    ann.title = name;

    ann.subtitle = type;

    ann.coordinate=region.center;

    [mapView addAnnotation:ann];

    [ann release];



    self.navigationItem.title=@"Map";

    [super viewDidLoad];

}

The map view also shows users location i think something is missing from the viewDidUnload method....

The MapAnnotation is a class that shows an annotation just holds a title and a subtitle.

i think the app keep tracking users location even if i leave the mapView.