如何将点作为单个要素添加到多边形？根据 GeoJson 规范，这被称为“GeometryCollection”。

Example of a 'GeometryCollection':

{ "type": "GeometryCollection", 
"geometries": [ 
  { "type": "Point", 
    "coordinates": [100.0, 0.0] 
    }, 
  { "type": "LineString", 
    "coordinates": [ [101.0, 0.0], [102.0, 1.0] ] 
    } 
 ] 
} 

我尝试向多边形要素添加一个点，但无法将其显示在我的 map 框 map 上，因为我猜它是无效的 GeoJson。

有谁知道这样做的正确方法是什么？网络上没有很多例子可供引用。

My take: [jsfilddle]

var myRegions = { 
 "type": "FeatureCollection", 
  "features": [ 
    { 
      "type": "Feature", 
      "properties": {}, 
      "geometries": [ 
        { 
            "type": "Point", 
            "coordinates": [ 
            61.34765625, 
            48.63290858589535 
            ] 
      }, 
        { 
        "type": "Polygon", 
        "coordinates": [ 
          [ 
            [ 
              59.94140624999999, 
              50.65294336725709 
            ], 
            [ 
              54.931640625, 
              50.90303283111257 
            ], 
            [ 
              51.943359375, 
              51.04139389812637 
            ], 
            [ 
              50.9765625, 
              48.19538740833338 
            ], 
            [ 
              52.55859375, 
              46.46813299215554 
            ], 
            [ 
              52.998046875, 
              43.8028187190472 
            ], 
            [ 
              54.4921875, 
              42.391008609205045 
            ], 
            [ 
              57.041015625, 
              43.29320031385282 
            ], 
            [ 
              59.8974609375, 
              45.398449976304086 
            ], 
            [ 
              62.5341796875, 
              44.08758502824516 
            ], 
            [ 
              65.6982421875, 
              45.73685954736049 
            ], 
            [ 
              68.37890625, 
              48.3416461723746 
            ], 
            [ 
              65.8740234375, 
              49.18170338770663 
            ], 
            [ 
              63.720703125, 
              49.97948776108648 
            ], 
            [ 
              63.80859374999999, 
              52.348763181988076 
            ], 
            [ 
              61.4794921875, 
              52.32191088594773 
            ], 
            [ 
              59.9853515625, 
              51.86292391360244 
            ], 
            [ 
              61.9189453125, 
              51.09662294502995 
            ], 
            [ 
              60.5126953125, 
              50.51342652633956 
            ], 
            [ 
              59.94140624999999, 
              50.65294336725709 
            ] 
          ] 
        ] 
      } 
   ] 
  } 
 ] 
}; 

请您参考如下方法:

正如 GeoJSON 规范中所说， Feature object正好一 geometry成员，这是一个 Geometry object (或 null)。

A feature object must have a member with the name "geometry". The value of the geometry member is a geometry object as defined above or a JSON null value.

其中可能 geometry你确实可以使用 GeometryCollection ，必须有成员 geometries .后者是其他几何图形的数组，即您的点、多边形等，甚至是另一个 GeometryCollection。

A geometry collection must have a member with the name "geometries". The value corresponding to "geometries" is an array. Each element in this array is a GeoJSON geometry object.

因此，在您的情况下，您可以简单地执行以下操作:

var myRegions = { 
  "type": "FeatureCollection", 
  "features": [{ 
    "type": "Feature", // single feature 
    "properties": {}, 
    "geometry": { // unique geometry member 
      "type": "GeometryCollection", // the geometry can be a GeometryCollection 
      "geometries": [ // unique geometries member 
        { // each array item is a geometry object 
          "type": "Point", 
          "coordinates": [ 
            61.34765625, 
            48.63290858589535 
          ] 
        }, 
        { 
          "type": "Polygon", 
          "coordinates": [ 
            [ 
              [ 
                59.94140624999999, 
                50.65294336725709 
              ], 
              // more points… 
              [ 
                59.94140624999999, 
                50.65294336725709 
              ] 
            ] 
          ] 
        } 
      ] 
    } 
  }] 
}; 

更新了 jsfiddle: http://jsfiddle.net/rh8ok5t8/18/