MongoDB $geoIntersects 不返回特定城市的任何数据答案

【问题标题】：MongoDB $geoIntersects doesn't return any data for particular cityMongoDB $geoIntersects 不返回特定城市的任何数据
【发布时间】：2018-06-22 20:05:20
【问题描述】：

我从谷歌地图中手动获取钦奈和班加罗尔城市的坐标并插入到我的数据库中。对于班加罗尔市，$geoIntersect 完美运行。但是，出于某种原因，对于钦奈市，它没有出现。我不确定我在哪里/我错过了什么。下面附上我的代码

班加罗尔城市详情

{
    "_id" : ObjectId("5b2d45ef4b511713052b49f9"),
    "cityId" : 10256,
    "countryEn" : "india",
    "countryAr" : "india ar",
    "provinceEn" : "Bangalore",
    "provinceAr" : "Bangalore ar",
    "cityEn" : "Bangalore",
    "cityAr" : "Bangalore ar",
    "lat" : 12.972442,
    "lon" : 77.580643,
    "countryCode" : "+91",
    "population" : 150257,
    "boundaries" : {
    "coordinates" : [
        [
            [
                77.747618,
                13.105034
            ],
            [
                77.758604,
                13.039487
            ],
            [
                77.816283,
                12.959201
            ],
            [
                77.825896,
                12.853452
            ],
            [
                77.742125,
                12.884244
            ],
            [
                77.700926,
                12.797213
            ],
            [
                77.461973,
                12.783821
            ],
            [
                77.412535,
                12.911017
            ],
            [
                77.390562,
                13.047514
            ],
            [
                77.525145,
                13.150506
            ],
            [
                77.636381,
                13.155855
            ],
            [
                77.747618,
                13.105034
            ]
        ]
    ],
    "type" : "Polygon"
    }
 }

我使用的查询

db.Cities_Master.find({
 boundaries: {
   $geoIntersects: {
     $geometry: { type: 'Point', coordinates: [77.5476, 13.105034] },
   },
 },
 })

钦奈市详情

{
    "_id" : ObjectId("5b2d4a734b511713052b4a01"),
    "cityId" : 10255,
    "countryEn" : "india",
    "countryAr" : "india ar",
    "provinceEn" : "chennai",
    "provinceAr" : "chennai ar",
    "cityEn" : "chennai",
    "cityAr" : "chennai ar",
    "lat" : 13.067439,
    "lon" : 80.237617,
    "countryCode" : "+91",
    "population" : 150257,
    "boundaries" : {
        "coordinates" : [
        [
            [
                80.309211,
                13.257326
            ],
            [
                80.332557,
                13.241285
            ],
            [
                80.332557,
                13.249305
            ],
            [
                80.295478,
                13.091519
            ],
            [
                80.248786,
                12.838584
            ],
            [
                80.149909,
                12.880089
            ],
            [
                80.097724,
                12.936309
            ],
            [
                80.123816,
                13.14368
            ],
            [
                80.320197,
                13.199841
            ],
            [
                80.178748,
                13.2092
            ],
            [
                80.239173,
                13.215885
            ],
            [
                80.309211,
                13.257326
            ]
        ]
    ],
    "type" : "Polygon"
    }
}

我用来查找 chennai 的查询

db.Cities_Master.find({
 boundaries: {
   $geoIntersects: {
     $geometry: { type: 'Point', coordinates: [80.309211, 13.257326] },
   },
 },
})

对于钦奈查询，我得到没有找到记录。我是否以错误的方式插入坐标或任何其他问题？任何帮助，将不胜感激。谢谢

【问题讨论】：

标签： mongodb geolocation mongodb-query

【解决方案1】：

Bangalore City 坐标由有效的闭合多边形表示，这就是 MongoDB 查询起作用的原因。在Chennai 情况下，坐标顺序不正确。您可以轻松查看here：

为了解决这个问题，您可以在数据库中重新排序不正确的coordinates。 Chennai 的有效文档可能如下所示：

db.Cities_Master.save({
        "_id" : ObjectId("5b2d4a734b511713052b4a01"),
        "cityId" : 10255,
        "countryEn" : "india",
        "countryAr" : "india ar",
        "provinceEn" : "chennai",
        "provinceAr" : "chennai ar",
        "cityEn" : "chennai",
        "cityAr" : "chennai ar",
        "lat" : 13.067439,
        "lon" : 80.237617,
        "countryCode" : "+91",
        "population" : 150257,
        "boundaries" : {
            "coordinates" : [
            [
                [
                    80.309211,
                    13.257326
                ],
                [
                    80.332557,
                    13.249305
                ],
                [
                    80.332557,
                    13.241285
                ],
                [
                    80.320197,
                    13.199841
                ],
                [
                    80.295478,
                    13.091519
                ],
                [
                    80.248786,
                    12.838584
                ],
                [
                    80.149909,
                    12.880089
                ],
                [
                    80.097724,
                    12.936309
                ],
                [
                    80.123816,
                    13.14368
                ],
                [
                    80.178748,
                    13.2092
                ],
                [
                    80.239173,
                    13.215885
                ],
                [
                    80.309211,
                    13.257326
                ]
            ]
        ],
        "type" : "Polygon"
        }
    })

可以预览here。在这种情况下，您的查询工作正常。

【讨论】：