private async void OnDrawComplete(MapViewEventArgs args)
{
if (_api != null)
{
MapView mapview = MapView.Active;
Map map = mapview?.Map;
SpatialReference spatRef = map?.SpatialReference;
Unit unit = spatRef?.Unit;
if (unit != null)
{
string unitName = unit.Name;
string label = _api.GetLengthUnitLabel();
if (label != unitName)
{
double factor = unit.ConversionFactor;
SpatialReference cyclSpatreference = await CoordSystemUtils.CycloramaSpatialReferenceAsync();
bool projected = cyclSpatreference.IsProjected;
Unit cyclUnit = cyclSpatreference.Unit;
double cyclFactor = cyclUnit.ConversionFactor;
var conversion = projected ? factor / cyclFactor : factor * cyclFactor;
_api.SetLengthUnitLabel(unitName);
_api.SetLengthUnitFactor(conversion);
}
}
}
}
public async Task <MapPoint> AddHeightToMapPointAsync(MapPoint srcPoint)
{
return(await QueuedTask.Run(async() =>
{
MapView mapView = MapView.Active;
Map map = mapView.Map;
SpatialReference srcSpatialReference = map.SpatialReference;
SpatialReference dstSpatialReference = await CoordSystemUtils.CycloramaSpatialReferenceAsync();
ProjectionTransformation dstProjection = ProjectionTransformation.Create(srcSpatialReference,
dstSpatialReference);
MapPoint dstPoint = GeometryEngine.Instance.ProjectEx(srcPoint, dstProjection) as MapPoint;
if (dstPoint != null)
{
double?height = await _cycloMediaGroupLayer.GetHeightAsync(dstPoint.X, dstPoint.Y);
if (height != null)
{
dstPoint = MapPointBuilder.CreateMapPoint(dstPoint.X, dstPoint.Y, ((double)height), dstSpatialReference);
ProjectionTransformation srcProjection = ProjectionTransformation.Create(dstSpatialReference,
srcSpatialReference);
srcPoint = GeometryEngine.Instance.ProjectEx(dstPoint, srcProjection) as MapPoint;
}
}
return srcPoint;
}));
}
