//step1 db.myCollection.insert({ //some details... loc:{ type:"point", coordinates:[0,0]} }) //step2 db.myCollection.createIndex({loc:"2dsphere"}) //{ "ok" : 0, "errmsg" : "Can't extract geo keys: { _id: \"0018m1tvHg\", loc: { type: \"point\", coordinates: [ 0.0, 0.0 ] } } unknown GeoJSON type: { type: \"point\", coordinates: [ 0.0, 0.0 ] }", "code" : 16755 }