Mongodb Sphere 索引拒绝我的对象

Question

您好，我有一个带有 2d 球体索引的集合

wayCollection.createIndex(new BasicDBObject("poly", "2dsphere"));

当我尝试插入某个对象时出现错误:

Exception in thread "main" com.mongodb.WriteConcernException: { "serverUsed" : "localhost:27017" , "ok" : 1 , "n" : 0 , "err" : "insertDocument :: caused by :: 16755 Can't extract geo keys from object, malformed geometry?: { _id: ObjectId('53a89dc6a0042baf54050037'), id: 24837452, version: \"64\", changeset: \"13731788\", uid: \"362915\", user: \"micha555\", timestamp: \"2012-11-03T09:11:23Z\", poly: { type: \"Polygon\", coordinates: [ [ [ 9.1244131, 50.0109503 ], [ 9.120464800000001, 50.0099731 ], [ 9.116641, 50.0077

虽然多边形环是闭合的(第一个和最后一个坐标相同)

有什么想法吗？

这是另一个被拒绝的多边形:

{
   "type":"Polygon",
   "coordinates":[
      [
         [
            9.0496053,
            51.3255584
         ],
         [
            9.0492235,
            51.32532
         ],
         [
            9.0495831,
            51.3251321
         ],
         [
            9.049917199999999,
            51.3253429
         ],
         [
            9.0496053,
            51.3255584
         ],
         [
            9.049984500000001,
            51.3258463
         ],
         [
            9.0505795,
            51.3262127
         ],
         [
            9.050045600000001,
            51.326574
         ],
         [
            9.0496432,
            51.3263928
         ],
         [
            9.049625300000001,
            51.3262806
         ],
         [
            9.0495628,
            51.3261244
         ],
         [
            9.0495316,
            51.3259341
         ],
         [
            9.0495471,
            51.3257127
         ],
         [
            9.0496053,
            51.3255584
         ]
      ]
   ]
}

当我把它粘贴到这里时，它似乎没问题:http://geojsonlint.com/

也许 mongo db 不喜欢一个点被使用两次

Answer 1

多边形是自相交的:

MongoDB 禁止这样的多边形。