private async Task <MapPoint> AddZOffsetAsync(MapPoint mapPoint)
{
return(await QueuedTask.Run(async() => mapPoint.HasZ
?MapPointBuilder.CreateMapPoint(mapPoint.X, mapPoint.Y,
mapPoint.Z + ((VectorLayer != null) ? await VectorLayer.GetOffsetZAsync() : 0),
mapPoint.SpatialReference)
: MapPointBuilder.CreateMapPoint(mapPoint.X, mapPoint.Y, mapPoint.SpatialReference)));
}