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Duplicate coordinate in GeoJSON LineString cause "malformed geometry" (2dsphere index)

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    • Type: Icon: Bug Bug
    • Resolution: Duplicate
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 2.4.1
    • Component/s: Geo
    • Labels:
      None
    • Environment:
      mongo shell on Ubuntu 12.10 64bit
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      Create a 'trails' collection with a 2dsphere index on "path" mine is like that (stats output):

      {
      "ns" : "sentido-development.trails",
      "count" : 34,
      "size" : 216960,
      "avgObjSize" : 6381.176470588235,
      "storageSize" : 2338816,
      "numExtents" : 2,
      "nindexes" : 2,
      "lastExtentSize" : 2330624,
      "paddingFactor" : 1,
      "systemFlags" : 1,
      "userFlags" : 0,
      "totalIndexSize" : 16352,
      "indexSizes" :

      { "_id_" : 8176, "path_2dsphere" : 8176 }

      ,
      "ok" : 1
      }

      Try to save an item with the following in mongodb shell (duplicate coordinates in bold):

      db.trails.insert({"name": "ch1086.121", "path": {"type": "LineString", "coordinates": [[7.416898, 47.339062], [7.416977, 47.339134],[7.416977, 47.339134]]}})

      You get:

      Can't extract geo keys from object, malformed geometry?:

      { type: "LineString", coordinates: [ [ 7.416898, 47.339062 ], [ 7.416977, 47.339134 ], [ 7.416977, 47.339134 ] ] }

      Wenn removing duplicates it works:

      db.trails.insert({"name": "ch1086.121", "path": {"type": "LineString", "coordinates": [[7.416898, 47.339062], [7.416977, 47.339134]]}})

      Show
      Create a 'trails' collection with a 2dsphere index on "path" mine is like that (stats output): { "ns" : "sentido-development.trails", "count" : 34, "size" : 216960, "avgObjSize" : 6381.176470588235, "storageSize" : 2338816, "numExtents" : 2, "nindexes" : 2, "lastExtentSize" : 2330624, "paddingFactor" : 1, "systemFlags" : 1, "userFlags" : 0, "totalIndexSize" : 16352, "indexSizes" : { "_id_" : 8176, "path_2dsphere" : 8176 } , "ok" : 1 } Try to save an item with the following in mongodb shell (duplicate coordinates in bold): db.trails.insert({"name": "ch1086.121", "path": {"type": "LineString", "coordinates": [ [7.416898, 47.339062] , [7.416977, 47.339134] , [7.416977, 47.339134] ]}}) You get: Can't extract geo keys from object, malformed geometry?: { type: "LineString", coordinates: [ [ 7.416898, 47.339062 ], [ 7.416977, 47.339134 ], [ 7.416977, 47.339134 ] ] } Wenn removing duplicates it works: db.trails.insert({"name": "ch1086.121", "path": {"type": "LineString", "coordinates": [ [7.416898, 47.339062] , [7.416977, 47.339134] ]}})

      When trying to insert a LineString GeoJSON containing duplicate coordinates pair you get.

      Can't extract geo keys from object, malformed geometry

      I would expect this to work. Duplicates coordinates can occur quite often for example when you are parsing gpx files and saving them (I noticed it that way).

            Assignee:
            Unassigned Unassigned
            Reporter:
            zeekox Mauro Carabotti
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              Created:
              Updated:
              Resolved: