MongoDB LBS查詢範例 : 找捷運台北車站附近距離2公里內的捷運站

mongodb_find_lbs.js

// 找捷運台北車站附近距離2公里內的捷運站
db.lbs_test.find({loc: {$near:[25.046084,121.517542] , $maxDistance:2/111.12 }}).forEach(printjson);

//查詢結果
{
        "_id" : ObjectId("5238179cdfba7ac818bb5fcd"),
        "name" : "捷運臺大醫院站",
        "loc" : {
                "lat" : 25.041535,
                "long" : 121.516029
        },
        "time" : 11
}
{
        "_id" : ObjectId("5238179cdfba7ac818bb5fd2"),
        "name" : "捷運中山站",
        "loc" : {
                "lat" : 25.052596,
                "long" : 121.520327
        },
        "time" : 16
}
{
        "_id" : ObjectId("5238179cdfba7ac818bb5fd3"),
        "name" : "捷運雙連站",
        "loc" : {
                "lat" : 25.057961,
                "long" : 121.520842
        },
        "time" : 17
}
{
        "_id" : ObjectId("5238179cdfba7ac818bb5fce"),
        "name" : "捷運中正紀念堂站",
        "loc" : {
                "lat" : 25.032922,
                "long" : 121.518481
        },
        "time" : 12
}
{
        "_id" : ObjectId("523817b1dfba7ac818bb5fdd"),
        "name" : "捷運東門站",
        "loc" : {
                "lat" : 25.033972,
                "long" : 121.528695
        },
        "time" : 27
}
{
        "_id" : ObjectId("523817b1dfba7ac818bb5fdc"),
        "name" : "捷運松江南京站",
        "loc" : {
                "lat" : 25.051974,
                "long" : 121.53303
        },
        "time" : 26
}
{
        "_id" : ObjectId("5238179ddfba7ac818bb5fd4"),
        "name" : "捷運民權西路站",
        "loc" : {
                "lat" : 25.063093,
                "long" : 121.519425
        },
        "time" : 18
}