Geo Spacial Bounding Box Rectangle Calculation Error: Latitude Incorrect

Question

Can any trig or GPS experts help me out here? I\'m trying to create a geo-spacial bounding box (rectangle) calculation returning the maximum latitude and longitude using the

Answer 1

I haven't looked at your code, but you could also use the MapKit function MKCoordinateRegionMakeWithDistance() to have the framework calculate a bounding box for you.

CLLocationCoordinate2D center = { 37.3, -122.0 };
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(center, 2000.0, 2000.0);
CLLocationCoordinate2D northWestCorner, southEastCorner;
northWestCorner.latitude  = center.latitude  - (region.span.latitudeDelta  / 2.0);
northWestCorner.longitude = center.longitude + (region.span.longitudeDelta / 2.0);
southEastCorner.latitude  = center.latitude  + (region.span.latitudeDelta  / 2.0);
southEastCorner.longitude = center.longitude - (region.span.longitudeDelta / 2.0);