$Geonear Aggregation Stage In Mongodb

{
  $geoNear: {
    near: { type: "Point", coordinates: [ <longitude> , <latitude> ] },
    distanceField: "<outputField>",
    maxDistance: <distance in meters>
  }
}

db.locations.createIndex({ location: "2dsphere" });

db.locations.aggregate([
  {
    $geoNear: {
      near: { type: "Point", coordinates: [  77.2295, 28.6129 ] },
      distanceField: "distance",
      maxDistance: 2000      
    }
  }
])

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