private async Task <MapPoint> ShowViewshed(MapView mapView, int featureId)
{
MapPoint searchPoint = ((RealtimeFeature)_rtCursor.Current).GetShape() as MapPoint;
searchPoint = GeometryEngine.Instance.Project(searchPoint, mapView.Map.SpatialReference) as MapPoint;
var observer = new Camera(searchPoint.X, searchPoint.Y, 200, -22, searchPoint.SpatialReference, CameraViewpoint.LookAt);
observer.ViewportHeight = 84;
observer.ViewportWidth = 134;
observer.Z = 100;
observer.Pitch = 0;
var viewshedAnalysis = new Viewshed(observer, 45, 60, 10, 600);
if (_vwDict[featureId] != null)
{
await mapView.RemoveExploratoryAnalysis(_vwDict[featureId]);
}
_vwDict[featureId] = viewshedAnalysis;
await mapView.AddExploratoryAnalysis(viewshedAnalysis);
return(searchPoint);
}
