Convert MapKit latitude and longitude to DMS format

Question

I am able to determine the latitude and longitude of a location in the center of a map with the following:

func TargetGridReference(outletMapView_PrimaryTargetLo         


        

Answer 1

Unfortunately there is no automatic conversion but you can easily create one as follow:

Swift 4 or later

func coordinateToDMS(latitude: Double, longitude: Double) -> (latitude: String, longitude: String) {
    let latDegrees = abs(Int(latitude))
    let latMinutes = abs(Int((latitude * 3600).truncatingRemainder(dividingBy: 3600) / 60))
    let latSeconds = Double(abs((latitude * 3600).truncatingRemainder(dividingBy: 3600).truncatingRemainder(dividingBy: 60)))

    let lonDegrees = abs(Int(longitude))
    let lonMinutes = abs(Int((longitude * 3600).truncatingRemainder(dividingBy: 3600) / 60))
    let lonSeconds = Double(abs((longitude * 3600).truncatingRemainder(dividingBy: 3600).truncatingRemainder(dividingBy: 60) ))

    return (String(format:"%d° %d' %.4f\" %@", latDegrees, latMinutes, latSeconds, latitude >= 0 ? "N" : "S"),
            String(format:"%d° %d' %.4f\" %@", lonDegrees, lonMinutes, lonSeconds, longitude >= 0 ? "E" : "W"))
}

---

let dms = coordinateToDMS(latitude: 48.8582487759147, longitude: 2.2945180844931)

print(dms.latitude)  // "48° 51' 29.6956" N"
print(dms.longitude) // "2° 17' 40.2651" E"

You can also extend CLLocationCoordinate2D to get your latitude/longitude DMS description:

import MapKit
extension FloatingPoint {
    var minutes:  Self {
        return (self*3600)
            .truncatingRemainder(dividingBy: 3600)/60
    }
    var seconds:  Self {
        return (self*3600)
            .truncatingRemainder(dividingBy: 3600)
            .truncatingRemainder(dividingBy: 60)
    }
}
extension CLLocationCoordinate2D {
    var dms: (latitude: String, longitude: String) {
        return (String(format:"%d° %d' %.4f\" %@",
                       Int(abs(latitude)),
                       Int(abs(latitude.minutes)),
                       abs(latitude.seconds),
                       latitude >= 0 ? "N" : "S"),
                String(format:"%d° %d' %.4f\" %@",
                       Int(abs(longitude)),
                       Int(abs(longitude.minutes)),
                       abs(longitude.seconds),
                       longitude >= 0 ? "E" : "W"))
    }
}

---

let coord = CLLocationCoordinate2D(latitude: 48.8582487759147, longitude: 2.2945180844931)

coord.dms.latitude   // "48° 51' 29.6956" N"
coord.dms.longitude  // "2° 17' 40.2651" E"