凱立德地圖 将地理坐标轉換為經緯度

前言：因項目需求以及客戶提出的要求要将百度地圖更換為凱立德地圖，是以就牽扯到經緯度轉換的問題，凱立德官方文檔對這方面提供的資訊少，沒有找到合适的解決方案，是以在幾經周折總算是找到一個比較委托的解決辦法。

地理坐标：437438300，134912100 (第一個參數代表經度，第二個代表次元)

K碼：8q91f4apv

經緯度：121.42437,37.415793

（參數僅供參考）

說明：

凱立德地圖 api 擷取地理坐标以及K碼都有相應的api，大家可以盡情調取，這裡隻根據K碼轉換為經緯度

是以請看轉換的demo（java代碼）

============================================================

由凱立德 k碼 轉換為經緯度

public class KCode {

    private double longitude;
    private double latitude;
    private  byte[] map34 = new byte[123];

    public KCode() {
        map34['0'] = 0;
        map34['1'] = 1;
        map34['2'] = 2;
        map34['3'] = 3;
        map34['4'] = 4;
        map34['5'] = 5;
        map34['6'] = 6;
        map34['7'] = 7;
        map34['8'] = 8;
        map34['9'] = 9;
        map34['a'] = 10;
        map34['b'] = 11;
        map34['c'] = 12;
        map34['d'] = 13;
        map34['e'] = 14;
        map34['f'] = 15;
        map34['g'] = 16;
        map34['h'] = 17;
        map34['i'] = 18;
        map34['j'] = 19;
        map34['k'] = 20;
        map34['m'] = 21;
        map34['n'] = 22;
        map34['p'] = 23;
        map34['q'] = 24;
        map34['r'] = 25;
        map34['s'] = 26;
        map34['t'] = 27;
        map34['u'] = 28;
        map34['v'] = 29;
        map34['w'] = 30;
        map34['x'] = 31;
        map34['y'] = 32;
        map34['z'] = 33;
    }

    public double getLongitude() {
        return longitude;
    }

    public double getLatitude() {
        return latitude;
    }
    //
    private int pow34(int i)
    {
        int sum = 1;
        while(i > 0)
        {
            sum *= 34;
            --i;
        }
        return sum;
    }
    //
    private int Convert34to10(String str34)
    {
        int sum = 0;
        for(int i = 0; i < str34.length(); ++i)
        {
            if( (str34.charAt(i) != 'l' && str34.charAt(i) != 'o') &&
                    ((str34.charAt(i) >= '0' && str34.charAt(i) <= '9') ||
                            (str34.charAt(i) >= 'a' && str34.charAt(i) <= 'z'))
                    )
            {
                sum += map34[ str34.charAt(i)] *  pow34(i);
            }
            else
            {
                System.out.println("invalid chaa");
                return -1;
            }
        }
        return sum;
    }
    //
    public int Convert(String kcode)
    {
        if(kcode.length() != 9)
        {
            return -1;
        }

        int lut,lat;

        char quad = kcode.charAt(0);
        switch(quad)
        {
            case '5':
                lut = Convert34to10(kcode.substring(1, 5));
                lat = Convert34to10(kcode.substring(5, 9));
                longitude = (double)lut / (3600 * 10) + 105;
                latitude = (double)lat / (3600 * 10) + 40;
                break;
            case '6':
                lut = Convert34to10(kcode.substring(1, 5));
                lat = Convert34to10(kcode.substring(5, 9));
                longitude = (double)lut / (3600 * 10) + 70;
                latitude = (double)lat / (3600 * 10) + 40;

                break;
            case '7':
                lut = Convert34to10(kcode.substring(1, 5));
                lat = Convert34to10(kcode.substring(5, 9));
                longitude = (double)lut / (3600 * 10) + 70;
                latitude = (double)lat / (3600 * 10) + 5;

                break;
            case '8':
                lut = Convert34to10(kcode.substring(1, 5));
                lat = Convert34to10(kcode.substring(5, 9));
                longitude = (double)lut / (3600 * 10) + 105;
                latitude = (double)lat / (3600 * 10) + 5;
                break;
            default:
        }
        return 0;
    }

    public static void main(String[] args) {
        KCode code = new KCode();
        code.Convert("8q91f4apv");

        System.out.println(code.getLongitude());
        System.out.println(code.getLatitude());
    }
}
           

上述代碼僅供參考。