function loadViewIndicator ( asyncEvent ) {

	            if ( asyncEvent.loaded === 0 ) return;

	            const viewIndicatorDiv = asyncEvent.target.responseXML.documentElement;
	            viewIndicatorDiv.style.width = scope.viewIndicatorSize + 'px';
	            viewIndicatorDiv.style.height = scope.viewIndicatorSize + 'px';
	            viewIndicatorDiv.style.position = 'absolute';
	            viewIndicatorDiv.style.top = '10px';
	            viewIndicatorDiv.style.left = '10px';
	            viewIndicatorDiv.style.opacity = '0.5';
	            viewIndicatorDiv.style.cursor = 'pointer';
	            viewIndicatorDiv.id = 'panolens-view-indicator-container';

	            scope.container.appendChild( viewIndicatorDiv );

	            const indicator = viewIndicatorDiv.querySelector( '#indicator' );
	            const setIndicatorD = function () {

	                scope.radius = scope.viewIndicatorSize * 0.225;
	                scope.currentPanoAngle = scope.camera.rotation.y - THREE.Math.degToRad( 90 );
	                scope.fovAngle = THREE.Math.degToRad( scope.camera.fov ) ;
	                scope.leftAngle = -scope.currentPanoAngle - scope.fovAngle / 2;
	                scope.rightAngle = -scope.currentPanoAngle + scope.fovAngle / 2;
	                scope.leftX = scope.radius * Math.cos( scope.leftAngle );
	                scope.leftY = scope.radius * Math.sin( scope.leftAngle );
	                scope.rightX = scope.radius * Math.cos( scope.rightAngle );
	                scope.rightY = scope.radius * Math.sin( scope.rightAngle );
	                scope.indicatorD = 'M ' + scope.leftX + ' ' + scope.leftY + ' A ' + scope.radius + ' ' + scope.radius + ' 0 0 1 ' + scope.rightX + ' ' + scope.rightY;

	                if ( scope.leftX && scope.leftY && scope.rightX && scope.rightY && scope.radius ) {

	                    indicator.setAttribute( 'd', scope.indicatorD );

	                }

	            };

	            scope.addUpdateCallback( setIndicatorD );

	            const indicatorOnMouseEnter = function () {

	                this.style.opacity = '1';

	            };

	            const indicatorOnMouseLeave = function () {

	                this.style.opacity = '0.5';

	            };

	            viewIndicatorDiv.addEventListener( 'mouseenter', indicatorOnMouseEnter );
	            viewIndicatorDiv.addEventListener( 'mouseleave', indicatorOnMouseLeave );
	        }
View indicator in upper left
@memberOf Viewer
@instance