须要,查问一个坐标点的左近地位
数据格式
能够用数组或者 geojson 的模式
<field>: [<x>, <y>]
<field>: [<longitude>, <latitude>]
GeoJSON
location: {
type: "Point",
coordinates: [-73.856077, 40.848447]
}
先列出经度,而后再列出纬度
比方 loc 字段
{
"city": "北京市",
"geo_id": 565932,
"geo_name": "万柳园 (长春堂药店)",
"lat": 39.850201868495773283,
"lng": 116.33426020654366084,
"loc": "[116.33426020654366084,39.850201868495773283]",
"status": 0
}
索引
创立 2dsphere 索引
2dsphere 索引反对查问球面几何实体对象
db.collection.createIndex({ <location field> : "2dsphere"} )
pymongo 查问例子
lng = geo['lng']
lat = geo['lat']
result = geos_collection.aggregate([
{"$geoNear": {
"near": {
"type": "Point",
"coordinates": [lng, lat] },
"distanceField": "distance",
"maxDistance": 2000,
"query": {"status": -1},
"spherical": True }
},
{"$limit": 10}
])
mongodb shell
db.o2o_geos.aggregate([
{
$geoNear: {near: { type: "Point", coordinates: [120.13606048541625171, 30.29447292933346958] },
distanceField: "distance",
maxDistance: 2000,
query: {status: -1},
spherical: true
}
}
])
- coordinates 查问的坐标点
- maxDistance 最大间隔
- query 过滤条件
links
- https://docs.mongodb.com/manu…
- https://docs.mongodb.com/manu…
- https://docs.mongodb.com/manu…