• GPRM/GNRMC定位信息的读取与解析


    帧头

    UTC时间

    状态

    纬度

    北纬/南纬

    经度

    东经/西经

    速度

    $GPRMC

    hhmmss.sss

    A/V

    ddmm.mmmm

    N/S

    dddmm.mmmm

    E/W

     

     

     

     

    方位角

    UTC日期

    磁偏角

    磁偏角方向

    模式

    校验

    回车换行

    ddmmyy

    000 - 180

    E/W

    A/D/E/N

    *hh

    CR+LF


     

     

     

     

     

    格 式: $GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>*hh<CR><LF>
    $GPRMC,024813.640,A,3158.4608,N,11848.3737,E,10.05,324.27,150706,,,A*50
    说 明:
    字段 0:$GPRMC,语句ID,表明该语句为Recommended Minimum Specific GPS/TRANSIT Data(RMC)推荐最小定位信息
              字段 1:UTC时间,hhmmss.sss格式
              字段 2:状态,A=定位,V=未定位
              字段 3:纬度ddmm.mmmm,度分格式(前导位数不足则补0)
              字段 4:纬度N(北纬)或S(南纬)
              字段 5:经度dddmm.mmmm,度分格式(前导位数不足则补0)
              字段 6:经度E(东经)或W(西经)
              字段 7:速度,节,Knots(一节也是1.852千米/小时)
              字段 8:方位角,度(二维方向指向,相当于二维罗盘)
              字段 9:UTC日期,DDMMYY格式
              字段10:磁偏角,(000 - 180)度(前导位数不足则补0)
              字段11:磁偏角方向,E=东,W=西
              字段12:模式,A=自动,D=差分,E=估测,N=数据无效(3.0协议内容)
              字段13:校验值

     /// <summary>
        /// GPS信息
        /// </summary>
        public class GPSInfo
        {
            public string Longitude;//经度
            public string Latitude; //纬度
            public string Speed;    //速度
            public string GPSStatus;//GPS状态 A=数据有效;V=数据无效
            public string GPSTime;//GPS时间
            public string GPSHeading;//航向
        }
    
        /// <summary>
        /// GPS/BD定位信息解析
        /// </summary>
        public static class GPSAnalysisClass
        {
            /// <summary>
            /// 打开串口
            /// </summary>
            /// <param name="_SerialPort">SerialPort</param>
            /// <param name="_PortName">PortName</param>
            /// <param name="_BaudRate">BaudRate</param>
            /// <returns></returns>
            public static bool OpenSerialPort(SerialPort _SerialPort, string _PortName, int _BaudRate)
            {
                bool Ret = false;
                try
                {
                    _SerialPort.Close();
                    _SerialPort.PortName = _PortName;
                    _SerialPort.BaudRate = _BaudRate;
                    _SerialPort.NewLine = Environment.NewLine;
                    _SerialPort.Open();
                    if (_SerialPort.IsOpen)
                        Ret = true;
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                    Ret = false;
                }
                return Ret;
            }
    
            /// <summary>
            /// GNRMC解析[北斗]
            /// </summary>
            /// <param name="_RecString">原始字符串</param>
            /// <returns>北斗定位信息</returns>
            public static GPSInfo GNRMCAnalysis(string _RecString)
            {
                GPSInfo gpsInfo = null;
                string[] strtemp = _RecString.Split('
    ');
                for (int i = 0; i < strtemp.Length; i++)
                {
                    string[] strtemp1 = strtemp[i].Split(',');
                    if (strtemp1.Length >= 12)
                    {
                        if (strtemp1[0] == "$GNRMC")
                        {
                            gpsInfo = new GPSInfo();
                            gpsInfo.GPSStatus = strtemp1[2];
                            gpsInfo.GPSHeading = strtemp1[8];
                            gpsInfo.Speed = strtemp1[7] == "" ? "" : Convert.ToDouble(Convert.ToDouble(strtemp1[7]) * 1.852).ToString("0.0");
                            gpsInfo.Latitude = strtemp1[3] == "" ? "" : GPSTransforming(strtemp1[3]).ToString("0.000000");
                            gpsInfo.Longitude = strtemp1[5] == "" ? "" : GPSTransforming(strtemp1[5]).ToString("0.000000");
                            gpsInfo.GPSTime = strtemp1[9] == "" ? "" : "20" + strtemp1[9].Substring(4, 2) + "-" + strtemp1[9].Substring(2, 2) + "-" + strtemp1[9].Substring(0, 2) + " " + strtemp1[1].Substring(0, 2) + ":" + strtemp1[1].Substring(2, 2) + ":" + strtemp1[1].Substring(4, 2);
                        }
                    }
                }
                return gpsInfo;
            }
    
            /// <summary>
            /// GPRM字符串解析[GPS]
            /// </summary>
            /// <param name="_RecString">原始字符串</param>
            /// <returns>GPS定位信息</returns>
            public static GPSInfo GPRMCAnalysis(string _RecString)
            {
                GPSInfo gpsInfo = null;
                if (!string.IsNullOrEmpty(_RecString))
                {
                    _RecString = _RecString.Contains("
    ") ? _RecString.Substring(0, _RecString.IndexOf("
    ")) : _RecString;
                    string[] seg = _RecString.Split(',');
                    if (seg.Length >= 12)
                    {
                        gpsInfo = new GPSInfo();
                        gpsInfo.GPSStatus = seg[2];//状态
                        gpsInfo.GPSHeading = seg[8];//角度
                        gpsInfo.Speed = seg[7] == "" ? "" : (Convert.ToDouble(seg[7]) * 1.852).ToString("0.0");//速度
                        gpsInfo.Latitude = seg[4] == "" ? "" : GPSTransforming(seg[3]).ToString("0.000000");
                        gpsInfo.Longitude = seg[6] == "" ? "" : GPSTransforming(seg[5]).ToString("0.000000"); ;
                        gpsInfo.GPSTime = seg[9] == "" ? "" : string.Format("20{0}-{1}-{2} {3}:{4}:{5}", seg[9].Substring(4), seg[9].Substring(2, 2), seg[9].Substring(0, 2), seg[1].Substring(0, 2), seg[1].Substring(2, 2), seg[1].Substring(4));
                    }
                }
                return gpsInfo;
            }
    
            /// <summary>
            /// 降度分秒格式经纬度转换为小数经纬度
            /// </summary>
            /// <param name="_Value">度分秒经纬度</param>
            /// <returns>小数经纬度</returns>
            private static double GPSTransforming(string _Value)
            {
                double Ret = 0.0;
                string[] TempStr = _Value.Split('.');
                string x = TempStr[0].Substring(0, TempStr[0].Length - 2);
                string y = TempStr[0].Substring(TempStr[0].Length - 2, 2);
                string z = TempStr[1].Substring(0, 4);
                Ret = Convert.ToDouble(x) + Convert.ToDouble(y) / 60 + Convert.ToDouble(z) / 600000;
                return Ret;
            }
        }

     

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  • 原文地址:https://www.cnblogs.com/88223100/p/GPRM_GNRMC_Transform.html
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