func generateImage(completion: @escaping (UIImage?) -> Void) {
        let mapSnapshotOptions = MKMapSnapshotter.Options()

        let span = MKCoordinateSpan(latitudeDelta: 0.008, longitudeDelta: 0.006)
        let region = MKCoordinateRegion(center: coordinates, span: span)

        // Set the region of the map that is rendered.
        mapSnapshotOptions.region = region

        // Set the scale of the image. We'll just use the scale of the current device, which is 2x scale on Retina screens.
        mapSnapshotOptions.scale = UIScreen.main.scale

        // Set the size of the image output.
        mapSnapshotOptions.size = CGSize(width: 300, height: 300)

        // Show buildings and Points of Interest on the snapshot
        mapSnapshotOptions.showsBuildings = true
        mapSnapshotOptions.showsPointsOfInterest = true

        let snapShotter = MKMapSnapshotter(options: mapSnapshotOptions)
        let rect = CGRect(x: 0, y: 0, width: 300, height: 300)

        snapShotter.start { (snapshot, error) in
            guard let snapshot = snapshot, error == nil else {
                completion(nil)
                return
            }

            UIGraphicsBeginImageContextWithOptions(mapSnapshotOptions.size, true, 0)
            snapshot.image.draw(at: .zero)

            let pinView = MKPinAnnotationView(annotation: nil, reuseIdentifier: nil)
            let pinImage = pinView.image

            var point = snapshot.point(for: self.coordinates)

            if rect.contains(point) {
                let pinCenterOffset = pinView.centerOffset
                point.x -= pinView.bounds.size.width / 2
                point.y -= pinView.bounds.size.height / 2
                point.x += pinCenterOffset.x
                point.y += pinCenterOffset.y
                pinImage?.draw(at: point)
            }

            let image = UIGraphicsGetImageFromCurrentImageContext()

            UIGraphicsEndImageContext()

            completion(image)
        }
    }