How to make the union between two MKCoordinateRegion

Question

I\'m trying to do the union between two MKCoordinateRegion. Does anybody have an idea on how to do this?

Answer 1

i did a little test on both 4.3 and 5.0 and it seems that the conversion is not correct

UIImageView *imageView = [[UIImageView alloc] initWithImage:[[UIImage imageNamed:@"heart.png"] imageByScalingProportionallyToSize:CGSizeMake(100, 100)]];
imageView.frame = CGRectMake(0, 0, 100, 100);
imageView.center = [mapView convertCoordinate:mapView.centerCoordinate toPointToView:canvasView];
[canvasView addSubview:imageView];

MKCoordinateRegion region = [mapView convertRect:imageView.frame toRegionFromView:canvasView];
MKMapRect maprect;
for (int i = 0; i < 5; i ++)
{
    maprect = [mapView mapRectForCoordinateRegion:region];
    NSLog(@"%f, %f, %f, %f", region.center.latitude, region.center.longitude, region.span.latitudeDelta, region.span.longitudeDelta);
    NSLog(@"%f, %f, %f, %f", maprect.origin.x, maprect.origin.y, maprect.size.width, maprect.size.height);
    region = MKCoordinateRegionForMapRect([mapView mapRectForCoordinateRegion:region]);
}

14.718256, -40.078125, 63.837150, 70.312500
78118912.000000, 94811514.406252, 52428800.000000, 52428799.999997
17.416993, -40.078125, 63.837150, 70.312500
78118912.000000, 91803983.982924, 52428800.000000, 53344239.567355
20.649080, -40.078125, 63.837150, 70.312500
78118912.000000, 87976363.978412, 52428800.000000, 54699220.734715
24.548345, -40.078125, 63.837150, 70.312500
78118912.000000, 82962597.189840, 52428800.000000, 56765991.576236
29.305644, -40.078125, 63.837150, 70.312500
78118912.000000, 76093086.024249, 52428800.000000, 60073659.997575