几何集合

几何集合的几何数组里的每个元素都是上面所描述的几何对象之一:

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