C#经纬度加减运算(度°分′秒″格式)

经度是分和秒是按60进位，如果要做运算第一步就是转换成浮点数，之后就是计算和还原。

using System.Text.RegularExpressions; public static double DegreeFromString(string str) { Match match = Regex.Match(str, @"(?<hour>[0-9]+)°(?<minute>[0-9]+)(′|')(?<second>[0-9]+(\.[0-9]+)?)(″|""|'')"); if (match.Success) { double hour = 0, minute = 0, second = 0; double.TryParse(match.Result("${hour}"), out hour); double.TryParse(match.Result("${minute}"), out minute); double.TryParse(match.Result("${second}"), out second); return hour + minute / 60 + second / 3600; } else return 0; } public static string DegreeToString(double degree) { double minute = (degree - (int)degree) * 60; double second = (minute - (int)minute) * 60; return string.Format( "{0:#}°{1:#}′{2:#.00}″", degree, Math.Abs(minute), Math.Abs(second)); } private void button1_Click(object sender, EventArgs e) { Console.WriteLine(DegreeToString(DegreeFromString("20°53'41''"))); Console.WriteLine(DegreeToString(DegreeFromString("10°11'20.5''"))); Console.WriteLine( DegreeToString(DegreeFromString("20°53'41''") - DegreeFromString("10°11'20.5''"))); Console.WriteLine( DegreeToString(DegreeFromString("10°11'20.5''") - DegreeFromString("20°53'41''"))); }

输出：

21°54′41.00″10°11′20.50″11°42′20.50″-11°42′20.50″

 from:http://www.csharpwin.com/csharpspace/9140r9620.shtml

转载于:https://www.cnblogs.com/ttssrs/p/3230462.html

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