緯度経度をGEOREFに変換する

1 目的
2 コード
3 使用例

目的

緯度経度をGEOREFコードに変換したい。

コード

    private string lat_georef_Convert(double d_lat, double d_long)
    {
        //GEOREF用文字
        string digraphLettersE = "ABCDEFGHJKLMNPQRSTUVWXYZ",
        digraphLettersN = "ABCDEFGHJKLMNPQ";

        string s_georef = "";
        int i_MQlat, i_MQlong,i_MRlat,i_MRlong,i_NRlat,i_NRlong;
        float f_NQlat, f_NQlong;
        if(d_long >= 180 || d_long < -180 || d_lat >= 90 || d_lat <= -90) { s_georef = "NULL"; return s_georef; }
        i_MQlong = (int)(d_long + 180) / 15;
        i_MQlat = (int)(d_lat + 90) / 15;
        i_MRlong = (int)(d_long + 180) % 15;
        i_MRlat = (int)(d_lat + 90) % 15;
        s_georef += digraphLettersE[i_MQlong];
        s_georef += digraphLettersN[i_MQlat];
        s_georef += digraphLettersN[i_MRlong];
        s_georef += digraphLettersN[i_MRlat];

        f_NQlong = (float)((d_long + 180) % 1.0f);
        f_NQlat = (float)((d_lat + 90) % 1.0f);
        i_NRlong = (int)(f_NQlong * 60);
        i_NRlat = (int)(f_NQlat * 60);
        s_georef += string.Format("{0:00}", i_NRlong);
        s_georef += string.Format("{0:00}", i_NRlat);

        return s_georef;
    }

private string lat_georef_Convert(double d_lat, double d_long)

{

//GEOREF用文字

string digraphLettersE = "ABCDEFGHJKLMNPQRSTUVWXYZ",

digraphLettersN = "ABCDEFGHJKLMNPQ";

string s_georef = "";

int i_MQlat, i_MQlong,i_MRlat,i_MRlong,i_NRlat,i_NRlong;

float f_NQlat, f_NQlong;

if(d_long >= 180 || d_long < -180 || d_lat >= 90 || d_lat <= -90) { s_georef = "NULL"; return s_georef; }

i_MQlong = (int)(d_long + 180) / 15;

i_MQlat = (int)(d_lat + 90) / 15;

i_MRlong = (int)(d_long + 180) % 15;

i_MRlat = (int)(d_lat + 90) % 15;

s_georef += digraphLettersE[i_MQlong];

s_georef += digraphLettersN[i_MQlat];

s_georef += digraphLettersN[i_MRlong];

s_georef += digraphLettersN[i_MRlat];

f_NQlong = (float)((d_long + 180) % 1.0f);

f_NQlat = (float)((d_lat + 90) % 1.0f);

i_NRlong = (int)(f_NQlong * 60);

i_NRlat = (int)(f_NQlat * 60);

s_georef += string.Format("{0:00}", i_NRlong);

s_georef += string.Format("{0:00}", i_NRlat);

return s_georef;

}

使用例

string georef = new string();
georef = lat_georef_Convert(35.0,139.0);
Console.WriteLine(georef);  //XJEF0000

string georef = new string();

georef = lat_georef_Convert(35.0,139.0);

Console.WriteLine(georef); //XJEF0000