CODEWITHSUNDEEP
objective-ccocoa-touchios4mkmapview
ios
ios

Reputation: 6164

How can I calculate the distance between two points in MkMapview?

In an iPhone App how can you calculate distance between two points in MKMapView as shown in the image below?

The first point would be the center point of the visible map in the mapview.

The 2nd point would be any of corner of the visible rectangle of the mapview (here, for example I have taken the top left point).

enter image description here

I want to calculate this distance in meters. How can I achieve that?

My goal is to calculate the ratios of the visible Map rectangle in MKMapview.

Upvotes: 8

Views: 20397

Answers (3)

Maverick
Maverick

Reputation: 3269

Swift 3+

let distance: CLLocationDistance = location1.distance(from: location2)

Upvotes: 3

Oliver
Oliver

Reputation: 23550

Here is how you can calculate the wanted distance :

// You first have to get the corner point and convert it to a coordinate
MKMapRect mapRect = self.mapView.visibleMapRect;
MKMapPoint cornerPointNW = MKMapPointMake(mapRect.origin.x, mapRect.origin.y);
CLLocationCoordinate2D cornerCoordinate = MKCoordinateForMapPoint(cornerPointNW);

// Then get the center coordinate of the mapView (just a shortcut for convenience)
CLLocationCoordinate2D centerCoordinate = self.mapView.centerCoordinate

// And then calculate the distance
CLLocationDistance distance = [cornerCoordinate distanceFromLocation:centerCoordinate];

Upvotes: 2

danielreiser
danielreiser

Reputation: 5360

You can get lat/lon of the center with:

convertPoint:toCoordinateFromView:

loc1 and loc2 are both CLLocation objs.

CLLocationDistance dist = [loc1 distanceFromLocation:loc2];

So these two tips should help you. if you need some code, let me know :-)

Upvotes: 32

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