[{"_id":ObjectId("5d826a4d1efa91047ca21941"),"location":{"type":"Point","coordinates":[10.7522,59.9138]},"name":"Oslo"},{"_id":ObjectId("5d826b1b258557047c43d397"),"location":{"type":"Point","coordinates":[10.7522,59.9938]},"name":"North of Oslo"},{"_id":ObjectId("5d826b33258557047c43d398"),"location":{"type":"Point","coordinates":[131.8869,43.1198]},"name":"Vladivostok"},{"_id":ObjectId("5d826b65258557047c43d399"),"location":{"type":"Point","coordinates":[-43.1729,-22.9068]},"name":"Rio"}]

db.collection.find({"location":{"$geoWithin":{"$center":[[131.8869,43.1198],4000]}}})