         geojson = turf.buffer(origindata, 1.5, {
                units: 'miles'
            });
            map.dataSources.add(Cesium.GeoJsonDataSource.load(geojson, {
                stroke: Cesium.Color.BLACK,
                fill: Cesium.Color.GRAY,
                strokeWidth: 15
            }));
        }
    </script>

</body>

</html>