小编use*_*187的帖子

我有以下数据：

{ 
    "_id" : ObjectId("55a8c1ba3996c909184d7a22"),
    "uid" : "1db82e8a-2038-4818-b805-76a46ba62639",
    "createdate" : ISODate("2015-07-17T08:50:02.892Z"),
    "palce" : "aa",
    "sex" : 1,
    "longdis" : 1,
    "location" : [ 106.607312, 29.575281 ]
}
{ 
    "_id" : ObjectId("55a8c1ba3996c909184d7a24"),
    "uid" : "1db82e8a-2038-4818-b805-76a46ba62639",
    "createdate" : ISODate("2015-07-17T08:50:02.920Z"),
    "palce" : "bbb",
    "sex" : 1,
    "longdis" : 1,
    "location" : [ 106.589896, 29.545098 ]
}
{
    "_id" : ObjectId("55a8c1ba3996c909184d7a25"),
    "uid" : "1db82e8a-2038-4818-b805-76a46ba62639",
    "createdate" : ISODate("2015-07-17T08:50:02.922Z"),
    "palce" : "ccc",
    "sex" : 1,
    "longdis" : 1,
    "location" : [ 106.590758, 29.566713 ]
}
{ …