How to find out distance between coordinates?

Question

I want to make it so that it will show the amount of distance between two CLLocation coordinates. Is there someway to do this without a complex math formula? If there isn't how would you do it with a formula?

Middlemost

@Cosyn Alright, I will next time. Sorry about that. – Middlemost

Answer 1

CLLocation has a distanceFromLocation method so given two CLLocations:

CLLocationDistance distanceInMeters = [location1 distanceFromLocation:location2];

or in Swift 4:

//: Playground - noun: a place where people can play

import CoreLocation


let coordinate₀ = CLLocation(latitude: 5.0, longitude: 5.0)
let coordinate₁ = CLLocation(latitude: 5.0, longitude: 3.0)

let distanceInMeters = coordinate₀.distance(from: coordinate₁) // result is in meters

you get here distance in meter so 1 miles = 1609 meter

if(distanceInMeters <= 1609)
 {
 // under 1 mile
 }
 else
{
 // out of 1 mile
 }

Blunderbuss

How would I convert this into miles? – Middlemost

According to Google, there are 0.000621371 miles in a meter. So, I'd suggest multiplying it by 0.000621371. – Blunderbuss

Ok great, thanks! I'll accept your answer in a few minutes when it will let me. – Middlemost

some times its showing wrong distance i checked with google map with same locations which i have given the same locations in the code. please any other way to calculate distance let me know please. – Goldy

Well, how far off is it? – Blunderbuss

This is not the true distance "By road" According to apple Docs - "This method measures the distance between the two locations by tracing a line between them that follows the curvature of the Earth. The resulting arc is a smooth curve and does not take into account specific altitude changes between the two locations." developer.apple.com/documentation/corelocation/cllocation/… .. so if you're looking for driving distance, the reliable way to find the correct distance so far has been Google Maps Distance Matrix API or MKRoute. – Stork

@Annjawn That really has nothing to do with the question as asked. – Blunderbuss

@GlennHowes yes it does, chances are that the OP is trying to find the driving (or other mode of transport) distance between two points in which case just a Geospatial distance as is derived by distanceFromLocation will be completely incorrect. For Driving distance, the correct implementation would be to use MKRoute which will give you the "Route Distance" distance in meters along with other stuff like expected travel time, transport type etc - developer.apple.com/documentation/mapkit/mkroute – Stork

And as reported by @Goldy (in comments above) this is the reason why his distances are incorrect when compared to Google Map. Google map and MKRoute will consider the route information to calculate the actual transport distance whereas the simple distanceFromLocation won't, so I suggest you update your answer to clarify this in order to avoid confusing people who reach this page through google. – Stork

How can i do that with a place with 2 Coordinates ? – Turnage

No, it's just a math calculation. It isn't a turn by turn database lookup. – Blunderbuss

let distanceInMiles = coordinate.distance(from:currentDeviceCoordinate) / 1609.344 // result is in miles – Valdovinos

Answer 2

Swift 4.1

import CoreLocation

//My location
let myLocation = CLLocation(latitude: 59.244696, longitude: 17.813868)

//My buddy's location
let myBuddysLocation = CLLocation(latitude: 59.326354, longitude: 18.072310)

//Measuring my distance to my buddy's (in km)
let distance = myLocation.distance(from: myBuddysLocation) / 1000

//Display the result in km
print(String(format: "The distance to my buddy is %.01fkm", distance))

Tallage

Answer 3

Try this out:

distanceInMeters = fromLocation.distanceFromLocation(toLocation)
distanceInMiles = distanceInMeters/1609.344

From Apple Documentation:

Return Value: The distance (in meters) between the two locations.

Erythromycin

Is there a way to turn it into miles? – Middlemost

Also from apple docs - "This method measures the distance between the two locations by tracing a line between them that follows the curvature of the Earth. The resulting arc is a smooth curve and does not take into account specific altitude changes between the two locations."developer.apple.com/documentation/corelocation/cllocation/… – Stork

Good, that you use the correct factor 1609.344. en.wikipedia.org/wiki/Mile – Coaction

For iOS 10+, it would be useful to perform the conversion to miles via the Measurement class: let miles = Measurement(value: meters, unit: UnitLength.meters).converted(to: UnitLength.miles).value – Pacificas

Answer 4

import CoreLocation

//My location
let myLocation = CLLocation(latitude: 31.5101892, longitude: 74.3440842)

//My Next Destination
let myNextDestination = CLLocation(latitude: 33.7181584, longitude: 73.071358)

//Finding my distance to my next destination (in km)
let distance = myLocation.distance(from: myNextDestination) / 1000

Leatrice

Answer 5

func calculateDistanceInMiles(){

    let coordinate₀ = CLLocation(latitude:34.54545, longitude:56.64646)
    let coordinate₁ = CLLocation(latitude: 28.4646, longitude:76.65464)
    let distanceInMeters = coordinate₀.distance(from: coordinate₁)
    if(distanceInMeters <= 1609)
    {
        let s =   String(format: "%.2f", distanceInMeters)
        self.fantasyDistanceLabel.text = s + " Miles"
    }
    else
    {
        let s =   String(format: "%.2f", distanceInMeters)
        self.fantasyDistanceLabel.text = s + " Miles"

    }
}

Haymow

While this code may answer the question, providing additional context regarding why and/or how this code answers the question improves its long-term value. – Identification

Answer 6

For swift 4

   let locationOne = CLLocation(latitude: lat, longitude: long)
   let locationTwo = CLLocation(latitude: lat,longitude: long)

  let distance = locationOne.distance(from: locationTwo) * 0.000621371

  distanceLabel.text = "\(Int(round(distance))) mi"

Purdum

Answer 7

For objective-c

You can use distanceFromLocation to find the distance between two coordinates.

Code Snippets:

CLLocation *loc1 = [[CLLocation alloc] initWithLatitude:lat1 longitude:lng1];

CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:lat2 longitude:lng2];

CLLocationDistance distance = [loc1 distanceFromLocation:loc2];

Your output will come in meters.

Rigi

the question here is captioned with 'swift'. So maybe you need to update your answer, or add "For objective-c :" @Rigi – Triforium

Answer 8

import UIKit
import CoreLocation

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        var currentLocation = CLLocation(latitude: 23.1929, longitude: 72.6156)
        var DestinationLocation = CLLocation(latitude: 23.0504, longitude: 72.4991)
        var distance = currentLocation.distance(from: DestinationLocation) / 1000
        print(String(format: "The distance to my buddy is %.01fkm", distance))
    }
}

Rapprochement

While this code may answer the question, it would be better to explain how it solves the problem without introducing others and why to use it. Code-only answers are not useful in the long run. – Malek

Answer 9

You can also use the HaversineDistance algorithm just like android developers used, this is helpfull when you have antother app in android similar to it, else above answer is correct for you.

import UIKit

func haversineDinstance(la1: Double, lo1: Double, la2: Double, lo2: Double, radius: Double = 6367444.7) -> Double {

let haversin = { (angle: Double) -> Double in
    return (1 - cos(angle))/2
}

let ahaversin = { (angle: Double) -> Double in
    return 2*asin(sqrt(angle))
}

// Converts from degrees to radians
let dToR = { (angle: Double) -> Double in
    return (angle / 360) * 2 * .pi
}

let lat1 = dToR(la1)
let lon1 = dToR(lo1)
let lat2 = dToR(la2)
let lon2 = dToR(lo2)

return radius * ahaversin(haversin(lat2 - lat1) + cos(lat1) * cos(lat2) * haversin(lon2 - lon1))
}

let amsterdam = (52.3702, 4.8952)
let newYork = (40.7128, -74.0059)

// Google says it's 5857 km so our result is only off by 2km which could be due to all kinds of things, not sure how google calculates the distance or which latitude and longitude google uses to calculate the distance.
haversineDinstance(la1: amsterdam.0, lo1: amsterdam.1, la2: newYork.0, lo2: newYork.1)

I have picked the code written above from the refrence link https://github.com/raywenderlich/swift-algorithm-club/blob/master/HaversineDistance/HaversineDistance.playground/Contents.swift

Cram

Answer 10

Swift 5.

func calculateDistance(mobileLocationX:Double,mobileLocationY:Double,DestinationX:Double,DestinationY:Double) -> Double {

        let coordinate₀ = CLLocation(latitude: mobileLocationX, longitude: mobileLocationY)
        let coordinate₁ = CLLocation(latitude: DestinationX, longitude:  DestinationY)

        let distanceInMeters = coordinate₀.distance(from: coordinate₁)

        return distanceInMeters
    }

use to

let distance = calculateDistance("add parameters")

Judicial