Geospatial indexes support queries involving locations and geometric data. MongoDB's 2dsphere index supports spherical geometry and GeoJSON objects, making it suitable for many real-world location queries.

A typical GeoJSON point uses coordinates in longitude, latitude order. Incorrect coordinate order is a common source of location bugs.

Geospatial queries can find documents within a region or near a location. The required query operator and index type depend on the desired geometry and coordinate representation. Validate coordinates and coordinate reference assumptions before indexing production data.

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

db.stores.find({
  location: {
    $near: {
      $geometry: {
        type: "Point",
        coordinates: [80.2707, 13.0827]
      },
      $maxDistance: 5000
    }
  }
});