如何将角度、分钟、秒和方向转换为经度和纬度坐标?

I have a value like following value. I want to convert these value into longitude and latitude coordinates. If possible with math operations.

我有如下值。我想把这些值转换成经度和纬度坐标。如果可能的话，用数学运算。

Input:

输入:

latitude: 40,58,36, N
longitude: 28,49, 16, E

Output:

输出:

latitude: 40.976667
longitude: 28.821111

2 个解决方案

#1

I don't know if there is a built-in function, but this will work:

我不知道是否有内置的功能，但这将会起作用:

func convert(degrees degrees: Double, minutes: Double, seconds: Double, direction: String) -> Double {
    let sign = (direction == "W" || direction == "S") ? -1.0 : 1.0
    return (degrees + (minutes + seconds/60.0)/60.0) * sign
}


let lattitude = convert(degrees: 40, minutes: 58, seconds: 36, direction: "N")  // 40.9766666666667
let longitude = convert(degrees: 28, minutes: 49, seconds: 16, direction: "W")  // -28.8211111111111

#2

you can extend your String class: Swift3 example:

可以扩展字符串类:Swift3示例:

extension String {
    func convertCoordinatesToInteger() -> Double {
        let array = self.components(separatedBy: ",")
        let sign = (array[2] == "W" || array[2] == "S") ? -1.0 : 1.0
        let deg = Double(array[0])!
        let min = Double(array[1])!
        let sec = Double(array[2])!
        return (deg + (min + sec/60.0)/60.0) * sign
    }

Simply call this function on your Coordinates String

只需在坐标字符串上调用这个函数

let myLatitude = "40,58,36,N".convertCoordinatesToDouble()

#1