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Refactor lat/long parsing

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This commit is contained in:
mort5161 2014-07-25 14:21:26 -07:00
parent 189b10d376
commit 9663da9cf2
3 changed files with 28 additions and 12 deletions
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8
src/NmeaParser.Shared/Nmea/Gps/GPGGA.cs
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@ -45,12 +45,8 @@ namespace NmeaParser.Nmea.Gps
protected override void LoadMessage(string[] message)
{
var time = message[0];
Latitude = int.Parse(message[1].Substring(0, 2), CultureInfo.InvariantCulture) + double.Parse(message[1].Substring(2), CultureInfo.InvariantCulture) / 60;
if (message[2] == "S")
Latitude *= -1;
Longitude = int.Parse(message[3].Substring(0, 3), CultureInfo.InvariantCulture) + double.Parse(message[3].Substring(3), CultureInfo.InvariantCulture) / 60;
if (message[4] == "W")
Longitude *= -1;
Latitude = NmeaMessage.StringToLatitude(message[1], message[2]);
Longitude = NmeaMessage.StringToLongitude(message[3], message[4]);
Quality = (FixQuality)int.Parse(message[5], CultureInfo.InvariantCulture);
NumberOfSatellites = int.Parse(message[6], CultureInfo.InvariantCulture);
Hdop = double.Parse(message[7], CultureInfo.InvariantCulture);

8
src/NmeaParser.Shared/Nmea/Gps/GPRMC.cs
View file

@ -38,12 +38,8 @@ namespace NmeaParser.Nmea.Gps
int.Parse(message[0].Substring(2, 2)),
int.Parse(message[0].Substring(4, 2)), DateTimeKind.Utc);
Active = (message[1] == "A");
Latitude = int.Parse(message[2].Substring(0, 2), CultureInfo.InvariantCulture) + double.Parse(message[2].Substring(2), CultureInfo.InvariantCulture) / 60;
if (message[3] == "S")
Latitude *= -1;
Longitude = int.Parse(message[4].Substring(0, 3), CultureInfo.InvariantCulture) + double.Parse(message[4].Substring(3), CultureInfo.InvariantCulture) / 60;
if (message[5] == "W")
Longitude *= -1;
Latitude = NmeaMessage.StringToLatitude(message[2], message[3]);
Longitude = NmeaMessage.StringToLongitude(message[4], message[5]);
Speed = double.Parse(message[6], CultureInfo.InvariantCulture);
Course = double.Parse(message[7], CultureInfo.InvariantCulture);
MagneticVariation = double.Parse(message[9], CultureInfo.InvariantCulture);

24
src/NmeaParser.Shared/Nmea/NmeaMessage.cs
View file

@ -16,6 +16,7 @@
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Reflection;
using System.Text;
@ -109,5 +110,28 @@ namespace NmeaParser.Nmea
{
return string.Format("${0},{1}", MessageType, string.Join(",", MessageParts));
}
internal static double StringToLatitude(string value, string ns)
{
try
{
double latitude = int.Parse(value.Substring(0, 2), CultureInfo.InvariantCulture) + double.Parse(value.Substring(2), CultureInfo.InvariantCulture) / 60;
if (ns == "S")
latitude *= -1;
return latitude;
}
catch { return double.NaN; }
}
internal static double StringToLongitude(string value, string ew)
{
try
{
double longitude = int.Parse(value.Substring(0, 3), CultureInfo.InvariantCulture) + double.Parse(value.Substring(3), CultureInfo.InvariantCulture) / 60;
if (ew == "W")
longitude *= -1;
return longitude;
}
catch { return double.NaN; }
}
}
}