如何在Mapbox GL中创建一条线？

// Step 1: 创建地图容器
mapboxgl.accessToken = 'your-access-token';
var map = new mapboxgl.Map({
  container: 'map',
  style: 'mapbox://styles/mapbox/streets-v11',
  center: [lng, lat],
  zoom: 10
});

// Step 2: 添加图层
map.on('load', function() {
  // Step 3: 创建数据源
  map.addSource('line-source', {
    type: 'geojson',
    data: {
      type: 'Feature',
      properties: {},
      geometry: {
        type: 'LineString',
        coordinates: [
          [lng1, lat1],
          [lng2, lat2],
          [lng3, lat3]
          // 添加更多坐标点
        ]
      }
    }
  });

  // Step 4: 添加线的样式
  map.addLayer({
    id: 'line-layer',
    type: 'line',
    source: 'line-source',
    layout: {
      'line-join': 'round',
      'line-cap': 'round'
    },
    paint: {
      'line-color': '#ff0000',
      'line-width': 3
    }
  });
});