private void ShowElevationOnChart(Collection <Feature> features)
{
ChartAxisLabels.Clear();
ChartData.Clear();
double distance = 0.0;
int index = 0;
PointShape lastPoint = new PointShape();
foreach (var feature in features)
{
PointShape point = new PointShape(feature.ColumnValues["point"]);
if (index++ != 0)
{
LineShape line = new LineShape(new Collection <Vertex> {
new Vertex(lastPoint), new Vertex(point)
});
distance += line.GetAccurateLength(4326, DistanceUnit.Meter, DistanceCalculationMode.Haversine);
}
double tmpDistance = Math.Round(distance / 1000.0, 2);
double value = Math.Round(double.Parse(feature.ColumnValues["elevation"]), 2);
ChartAxisLabels.Add(tmpDistance);
ChartData.Add(new ChartInformation(value, point.X, point.Y, tmpDistance));
lastPoint = point;
}
var mapper = Mappers.Xy <ChartInformation>().X(value => value.Distance).Y(value => value.Elevation);
Charting.For <ChartInformation>(mapper);
DataContext = this;
}