$geoIntersects

The $geoIntersects operator selects documents whose location field intersects with a specified GeoJSON object. This operator is useful when you want to find stores that intersect with a specific geographical area.

Syntax

The syntax for the $geoIntersects operator is as follows:

{
  <location field>: {
    $geoIntersects: {
      $geometry: {
        type: <GeoJSON type>,
        coordinates: <coordinates>
      }
    }
  }
}

Parameters

Parameter Description
location field The field containing the GeoJSON object
type The GeoJSON object type (for example, "Polygon", "MultiPolygon")
coordinates The coordinates defining the GeoJSON object

Example

For better performance, start with creating the required 2dsphere index.

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

Now, let's find stores that intersect with a specific polygon area using the stores collection. This polygon encompasses several store locations from our dataset.

db.stores.find({
  'location': {
    $geoIntersects: {
      $geometry: {
        type: "Polygon",
        coordinates: [[
          [-80.0, -75.0],   // Bottom-left
          [-80.0, -70.0],   // Top-left
          [-55.0, -70.0],   // Top-right
          [-55.0, -75.0],   // Bottom-right
          [-80.0, -75.0]    // Close polygon
        ]]
      }
    }
  }
}, {
  "name": 1,
  "location": 1
}).limit(2)

This query returns stores, whose locations intersect with the Polygon contour defined by the coordinates.

  {
    "_id": "6bba7117-d180-4584-b50c-a2f843e9c9ab",
    "name": "Wide World Importers | Craft Supply Mart - Heaneybury",
    "location": { "lat": -64.4843, "lon": -107.7003 },
    "city": "Heaneybury"
  },
  {
    "_id": "2fd37663-e0ff-41d0-9c5a-3aec86285daa",
    "name": "Relecloud | Cleaning Supply Closet - Patiencehaven",
    "location": { "lat": -70.6077, "lon": -105.9901 },
    "city": "Patiencehaven"
  }

The operator is useful for use cases like

  • Finding stores within a specific geographical boundary
  • Identifying service coverage areas
  • Planning delivery routes

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