     maxZoom: 13,
            attributionControl: false
        });

        map.dragRotate.disable();
        map.touchZoomRotate.disableRotation();

        map.on('load', function () {
            // Add a new source from our GeoJSON data and
            // set the 'cluster' option to true. GL-JS will
            // add the point_count property to your source data.
            map.addSource('activities', {
                type: 'geojson',
                data: data
            });


            map.addLa