给定两组坐标，我如何计算它们之间的距离？

Question

假设我有两点：

var lat1 =  37.7833 
var lon1 = -122.4167
var lat2 =  39.4811 
var lon2 = -118.9558

如何计算它们之间的距离，最简单的方法？ （考虑到地球的曲率）

我查看了this回答，但CCLocation在Swift 2.0中没有初始化程序

Answer 1

let coord1 = CLLocation(latitude: 37.7833, longitude: -122.4167)
let coord2 = CLLocation(latitude: 39.4811, longitude: -118.9558)
let distance = coord1.distance(from: coord2)

print("the distance between the two points is: \(distance) meters")

Answer 2

我一直在使用它，对我来说非常适合： -

data TAL :: (k -> k -> *) -> k -> k -> * where
  Nil :: TAL c x x
  (:::) :: c x y -> TAL c y z -> TAL c x z