mongodb geonear
黄舟
黄舟 2017-05-02 09:17:53
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使用db.runCommand({geoNear : “collectionName” , near : [120.123456,30.654321], num : 10 })查询之前我需要准备什么样子的集合collection ?collection相应的字段和索引???
黄舟
黄舟

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大家讲道理

collection里面需要以GeoJson格式添加坐标的信息,例如:

{ type: "Point", coordinates: [ 40, 5 ] }

还需要建一个2dsphere类型的索引,例如:

db.collection.createIndex( { <location field> : "2dsphere" } )

更多细节请看mongodb的文档:
https://docs.mongodb.org/manual/core/2dsphere/

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