地理经纬度(度)与经纬度(度分秒)之间互转

        public static double Dms2Degree(CoordDms dms)
        {
            if (null != dms)
            {
                decimal decD = new decimal(dms.Degree);
                decimal decM = new decimal(dms.Minute);
                decimal decS = new decimal(dms.Second);
                decimal dec60 = new decimal(60.0);

                decimal decDDouble = decD + (decM / dec60) + (decS / dec60 / dec60);
                return decimal.ToDouble(decDDouble);
            }

            return 0;
        }

        public static CoordDms Degree2Dms(double d)
        {
            decimal dec = new decimal(d);
            Decimal dec60 = new decimal(60.0);
            CoordDms cd = new CoordDms();
            cd.Degree = decimal.ToInt32(dec);
            decimal min = decimal.Multiply(dec - new decimal(cd.Degree), dec60);
            cd.Minute = decimal.ToInt32(min);
            decimal sec = min - new decimal(cd.Minute);
            cd.Second = decimal.ToDouble(decimal.Multiply(sec, dec60));

            return cd;
        }    
        public class CoordDms
        {
            public int Degree { get; set; }
            public int Minute { get; set; }
            public Double Second { get; set; }
        }

@小七de尾巴