1.1.举例

GeoJSON要素集合：

 { "type": "FeatureCollection",
   "features": [
     { "type": "Feature",
       "geometry": {"type": "Point", "coordinates": [102.0, 0.5]},
       "properties": {"prop0": "value0"}
       },
     { "type": "Feature",
       "geometry": {
         "type": "LineString",
         "coordinates": [
           [102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]
           ]
         },
       "properties": {
         "prop0": "value0",
         "prop1": 0.0
         }
       },
     { "type": "Feature",
        "geometry": {
          "type": "Polygon",
          "coordinates": [
            [ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0],
              [100.0, 1.0], [100.0, 0.0] ]
            ]
        },
        "properties": {
          "prop0": "value0",
          "prop1": {"this": "that"}
          }
        }
      ]
    }