    8: [500, 2000],
            9: [500, 2000],
            10: [200, 1000],
            11: [100, 500],
            12: [50, 200],
            13: [20, 100],
            14: [10, 50]
          },
          contourLayer: "contours",
          elevationKey: "ele",
          levelKey: "level",
          extent: 4096,
          buffer: 1,
        }),
      ],
      maxzoom: 15,
    })
    map.addLayer({
      id: "contour-lines",
      type: "line",
      source: "contour-source",
      "source-layer": "contou