private void buildFlightPath() { // Use geometry engine to create a circle around the center of the scene Geometry circle = GeometryEngine.EllipseGeodesic(new GeodesicEllipseParameters(centerPoint, 1700, 1700)); // Create a path around the perimeter of the circle routePath = (Polyline)GeometryEngine.Boundary(circle); // Store the length of the route for use later routeLength = GeometryEngine.Length(routePath); }