2dsphere Index
Create a 2dsphere Index
db.collection.createIndex()
method is used to create a 2dsphere
index. The blueprint of a 2dsphere
index :
db.collection.createIndex( { <location field> : "2dsphere" } )
Here, the location field
is the key and 2dsphere
is the type of the index. In the following example we are going to create a 2dsphre
index in the places
collection.
db.places.insert(
{
loc : { type: "Point", coordinates: [ -73.97, 40.77 ] },
name: "Central Park",
category : "Parks"
})
The following operation will create 2dsphere
index on the loc
field of places
collection.
db.places.createIndex( { loc : "2dsphere" } )