MongoDB geolocation Index

Source: Internet
Author: User

Initialize collection (longitude in front, latitude in rear)

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123 mongos> db.checkins.insert({ "_id" : "101", "loc" : [ 116.3447, 39.9789 ]})mongos> db.checkins.insert({ "_id" : "102", "loc" : [ 116.3447, 39.8789 ]})mongos> db.checkins.insert({ "_id" : "103", "loc" : [ 116.3447, 39.5789 ]})

Create Geospatial Index

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1 mongos> db.checkins.ensureIndex({loc:"2d"})

Find people within 44km

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1 mongos> db.checkins.find({loc:{$near:[116.344722,39.9789],$maxDistance:44/111.12}})

Note the distance is divided by 111.2 (1 degrees =111.2km)

calculate/show Coordinate distance

About MongoDB Geospatial Index See StackOverflow

MongoDB geolocation Index

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