gistfile1.txt

    CLLocationCoordinate2D min = CLLocationCoordinate2DMake(99999.0, 99999.0);
    CLLocationCoordinate2D max = CLLocationCoordinate2DMake(-99999.0, -99999.0);
    
    // find max/min....
    
    // zoom to cover area
    // TODO: Maybe better using a MKPolygon which can calculate its own fitting region.
    CLLocationCoordinate2D center = CLLocationCoordinate2DMake((max.latitude + min.latitude) / 2.0, (max.longitude + min.longitude) / 2.0);
    MKCoordinateSpan span = MKCoordinateSpanMake(max.latitude - min.latitude, max.longitude - min.longitude);
    MKCoordinateRegion region = MKCoordinateRegionMake(center, span);
    
    [_mapView setRegion:[_mapView regionThatFits:region] animated:YES];