geojson 镇、街道

前三级获取方法

datav.aliyun.com/portal/scho…
map.easyv.cloud/ (这个还可以转换坐标系)

三级以后

上面的方法就不行了

下载软件bigmap

不用授权也行，选择地图那里点添加

添加在线地图源/url就是获取瓦片的接口 header 定义value 填瓦片接口的域名， 点击确定
ps: 测试连接不通过也可以过

然后选择自己要的区域点击下载，下载为kml文件

最后去

geojson.io | powered by Mapbox

把文件依次上传上去，可以组合

点击 save => geojson

echarts map 的json 和这个有些冲突

目前是手动操作的 如果有更好的方法，望能分享 如下操作都是借鉴 datav.aliyun.com/portal/scho… 的结果去总结的，可能不完全

比如

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "GeometryCollection",
        "geometries": [
          {
            "type": "Polygon",
            "coordinates": [
              []
            ]
          },
          
        ]
      },
      "properties": {
        "name": "xxx",
        "fill-opacity": 0,
        "stroke-opacity": 1,
        "stroke": "#ff0000"
      }
    },
  ]
}

改成如下

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          []
        ]
      },
      "properties": {
        "name": "xxx",
        "fill-opacity": 0,
        "stroke-opacity": 1,
        "stroke": "#ff0000"
      }
    },
  ]
}

多个区域，采用MultiPolygon coordinates 就是 多一层[]
Polygon 3层 MultiPolygon 4层

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "MultiPolygon",
        "coordinates": [
          [
            [
                xxx
            ]
          ],
          [
            [
                xxx
            ]
          ]
        ]
      },
      "properties": {
        "name": "xxx",
        "fill-opacity": 0,
        "stroke-opacity": 1,
        "stroke": "#ff0000"
      }
    },
  ]
}

挖空的就是 3层 Polygon

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            xxx
          ],
          [
            xxx  挖空的地方
          ]
        ]
      },
      "properties": {
        "name": "xxx",
        "fill-opacity": 0,
        "stroke-opacity": 1,
        "stroke": "#ff0000"
      }
    },
  ]
}