public IEnumerable <GpsTrack> GetTracks(string gpxFile)
{
var xdoc = XDocument.Load(gpxFile);
if (String.Equals(xdoc.Root.Name.LocalName, "gpx", StringComparison.InvariantCultureIgnoreCase))
{
foreach (var trk in
from el in xdoc.Root.Elements()
where String.Equals(el.Name.LocalName, "trk", StringComparison.InvariantCultureIgnoreCase)
select el)
{
var ret = new GpsTrack()
{
Name = String.Empty,
Points = new List <GpsPoint>()
};
var name = trk.Elements().FirstOrDefault(xe => String.Equals(xe.Name.LocalName, "name", StringComparison.InvariantCultureIgnoreCase));
if (name != null)
{
ret.Name = name.Value;
}
var points = from seg in trk.Elements()
where String.Equals(seg.Name.LocalName, "trkseg", StringComparison.InvariantCultureIgnoreCase)
from point in seg.Elements()
where String.Equals(point.Name.LocalName, "trkpt", StringComparison.InvariantCultureIgnoreCase)
let gps = GetPointFromXml(point)
orderby gps.Time
select gps;
ret.Points = points.ToList();
yield return(ret);
}
}
}
public PlotGraph GetGraphFromTrack(GpsTrack trk, bool useImperial)
{
var ret = new PlotGraph()
{
Name = trk.Name,
MaxElevation = 0.0d,
MinElevation = 0.0d,
TotalDistance = 0.0d,
TotalElevationGain = 0.0d,
TotalElevationLoss = 0.0d,
Points = new List <PlotPoint>(trk.Points.Count)
};
if (trk.Points.Count < 1)
{
return(ret);
}
var last = trk.Points[0];
var first = new PlotPoint()
{
Distance = 0.0d,
Elevation = IfMetersToFeet(useImperial, last.Elevation)
};
ret.MaxElevation = IfMetersToFeet(useImperial, last.Elevation);
ret.MinElevation = IfMetersToFeet(useImperial, last.Elevation);
ret.Points.Add(first);
foreach (var point in trk.Points.Skip(1))
{
ret.TotalDistance += IfKilometersToMiles(useImperial, DistanceBetween(last, point));
var eleChange = point.Elevation - last.Elevation;
if (eleChange > 0)
{
ret.TotalElevationGain += IfMetersToFeet(useImperial, eleChange);
}
else
{
ret.TotalElevationLoss += IfMetersToFeet(useImperial, eleChange * -1);
}
var useElev = IfMetersToFeet(useImperial, point.Elevation);
if (useElev > ret.MaxElevation)
{
ret.MaxElevation = useElev;
}
if (useElev < ret.MinElevation)
{
ret.MinElevation = useElev;
}
var newPoint = new PlotPoint()
{
Distance = ret.TotalDistance,
Elevation = useElev
};
ret.Points.Add(newPoint);
last = point;
}
return(ret);
}
