/// <summary>
/// When passed a file, open it and parse all tracks
/// and track segments from it.
/// </summary>
/// <param name="sFile">Fully qualified file name (local)</param>
/// <returns>
/// string containing line delimited waypoints from the
/// file (for test)
/// </returns>
public static List <Track> LoadGpxTracks(string sFile)
{
try
{
var gpxDoc = XDocument.Load(sFile);
var gpx = gpxDoc.Root.Name.Namespace;
var trkList = (from track in gpxDoc.Descendants(gpx + @"trk")
select new Track
{
Name = track.Element(gpx + @"name")?.Value ?? track.Element(gpx + @"desc")?.Value,
Segments = (
from tracksegment in track.Descendants(gpx + @"trkseg")
select new TrackSeg
{
Pts =
(
from trackpoint in tracksegment.Descendants(gpx + @"trkpt")
select new Point
{
Lat = Geo.DecodeGeoDegrees(trackpoint.Attribute(@"lat")?.Value),
Lon = Geo.DecodeGeoDegrees(trackpoint.Attribute(@"lon")?.Value),
ElevationGpx =
trackpoint.Element(gpx + @"ele") != null
? double.Parse(
Geo.CleanupLatLonHgtForConversion(trackpoint.Element(gpx + @"ele")?
.Value))
: (double?)null,
DateTimeGpx = GetDateTimeFromWpt(trackpoint)
}
).ToList()
}
).ToList()
}).ToList();
foreach (var trk in trkList)
{
if (trk.Segments == null)
{
continue;
}
foreach (var seg in trk.Segments)
{
seg.RecalcBounds();
}
}
return(trkList);
}
catch (Exception)
{
return(new List <Track>()); //empty.
}
}
public static Point?Parse(string lat, string lon)
{
if (!Geo.TryDecodeGeoDegrees(lat, out var latDegrees))
{
return(null);
}
if (!Geo.TryDecodeGeoDegrees(lon, out var lonDegrees))
{
return(null);
}
return(new Point(latDegrees, lonDegrees));
}