Yubeshi/Nmea/GpGga.cs

   1 /*\r
   2  *      Yubeshi GPS Parser\r
   3  *\r
   4  *      This software is distributed under a zlib-style license.\r
   5  *      See license.txt for more information.\r
   6  */\r
   7 \r
   8 using System;\r
   9 using System.Collections.Generic;\r
  10 using System.Text;\r
  11 \r
  12 namespace Yubeshi.Nmea\r
  13 {\r
  14     /// <summary>\r
  15     ///     Global Positioning System Fix Data\r
  16     /// </summary>\r
  17         public class GpGga : Packet\r
  18     {\r
  19         #region type definitions\r
  20         public enum FixQualityClass\r
  21         {\r
  22             Invalid = 0,\r
  23             Gps = 1,\r
  24             Dgps = 2,\r
  25             Pps = 3,\r
  26             Rtk = 4,\r
  27             FloatRtk = 5,\r
  28             Estimated = 6,\r
  29         }\r
  30         #endregion\r
  31         #region fields\r
  32 \r
  33         private static readonly byte[] header;\r
  34         private const int elementNum = 14;\r
  35 \r
  36         #endregion\r
  37 \r
  38         #region constructors\r
  39 \r
  40         static GpGga()\r
  41         {\r
  42             header = Encoding.ASCII.GetBytes("$GPGGA,");\r
  43         }\r
  44 \r
  45                 public GpGga()\r
  46                 {\r
  47                 }\r
  48 \r
  49                 public GpGga(byte[] sentence)\r
  50             : this(sentence, GetElements(sentence, elementNum))\r
  51                 {\r
  52         }\r
  53 \r
  54         private GpGga(byte[] sentence, Elements elements)\r
  55             : base(sentence, elements.PacketLength)\r
  56         {\r
  57             string[] v = elements.Values;\r
  58             TimeOfFix = ParseTime(v[0]);\r
  59             Position = new GeodeticCoordinate(\r
  60                                     Degree.FromNmeaFormat(v[1], v[2]),\r
  61                                     Degree.FromNmeaFormat(v[3], v[4]));\r
  62             FixQuality = (FixQualityClass)Int32.Parse(v[5]);\r
  63             TrackedSatellites = Int32.Parse(v[6]);\r
  64             HorizontalDop = ParseDouble(v[7]);\r
  65             MslAltitude = new Height(GetLength(v[8], v[9]), \r
  66                                                     Height.Base.MeanSeaLevel);\r
  67             GeoidSeparation = new Height(GetLength(v[10], v[11]),\r
  68                                                 Height.Base.Wgs84Ellipsoid);\r
  69             double age = ParseDouble(v[12]);\r
  70             \r
  71             AgeOfDgpsCorrections = Double.IsNaN(age)?\r
  72                                 TimeSpan.MinValue :TimeSpan.FromSeconds(age);\r
  73             DgpsStation = ParseInt(v[13], -1);\r
  74             CheckSum = elements.CheckSum;\r
  75         }\r
  76 \r
  77         #endregion\r
  78 \r
  79         #region properties\r
  80 \r
  81         public TimeSpan TimeOfFix\r
  82         {\r
  83             get;\r
  84             private set;\r
  85         }\r
  86         \r
  87         public GeodeticCoordinate Position\r
  88         {\r
  89             get;\r
  90             private set;\r
  91         }\r
  92 \r
  93         public FixQualityClass FixQuality\r
  94         {\r
  95             get;\r
  96             private set;\r
  97         }\r
  98 \r
  99         public int TrackedSatellites\r
 100         {\r
 101             get;\r
 102             private set;\r
 103         }\r
 104 \r
 105         public double HorizontalDop\r
 106         {\r
 107             get;\r
 108             private set;\r
 109         }\r
 110 \r
 111         public Height MslAltitude\r
 112         {\r
 113             get;\r
 114             private set;\r
 115         }\r
 116 \r
 117         public Height GeoidSeparation\r
 118         {\r
 119             get;\r
 120             private set;\r
 121         }\r
 122 \r
 123         public TimeSpan AgeOfDgpsCorrections\r
 124         {\r
 125             get;\r
 126             private set;\r
 127         }\r
 128 \r
 129         public int DgpsStation\r
 130         {\r
 131             get;\r
 132             private set;\r
 133         }\r
 134         #endregion\r
 135 \r
 136 \r
 137         public static bool TryParse(byte[] sentence, out UnknownPacket packet)\r
 138         {\r
 139             return TryParse(sentence, out packet, header, elementNum, Build);\r
 140         }\r
 141 \r
 142         private static Packet Build(byte[] sentence, Elements elements)\r
 143         {\r
 144             return new GpGga(sentence, elements);\r
 145         }\r
 146 \r
 147         }\r
 148 }