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Query for Locations that Intersect a GeoJSON Object

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  • About this Task
  • Before You Begin
  • Procedure
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You can query for location data that intersects with a GeoJSON object. For example, consider an application that stores coordinates of gas stations. You can create a GeoJSON LineString that represents a road trip, and query for gas stations that intersect with the road trip route.

To query for location data that intersects with a GeoJSON object, use the $geoIntersects operator:

db.<collection>.find( {
<location field> : {
$geoIntersects : {
$geometry : {
type : "<GeoJSON object type>",
coordinates : [ <coordinates> ]
}
}
}
} )
  • When you specify longitude and latitude coordinates, list the longitude first, and then latitude.

    • Valid longitude values are between -180 and 180, both inclusive.

    • Valid latitude values are between -90 and 90, both inclusive.

  • A location intersects with an object if it shares at least one point with the specified object. This includes objects that have a shared edge.

  • $geoIntersects does not require a geospatial index. However, a geospatial index improves query performance. Only the 2dsphere geospatial index supports $geoIntersects. For more information see Create a 2dsphere Index.

Create a gasStations collection that contains these documents:

db.gasStations.insertMany( [
{
loc: { type: "Point", coordinates: [ -106.31, 35.65 ] },
state: "New Mexico",
country: "United States",
name: "Horizons Gas Station"
},
{
loc: { type: "Point", coordinates: [ -122.62, 40.75 ] },
state: "California",
country: "United States",
name: "Car and Truck Rest Area"
},
{
loc: { type: "Point", coordinates: [ -72.71, 44.15 ] },
state: "Vermont",
country: "United States",
name: "Ready Gas and Snacks"
}
] )

The following $geoIntersects query specifies a LineString containing four points and returns documents that intersect with the line:

db.gasStations.find( {
loc: {
$geoIntersects: {
$geometry: {
type: "LineString",
coordinates: [
[ -105.82, 33.87 ],
[ -106.01, 34.09 ],
[ -106.31, 35.65 ],
[ -107.39, 35.98 ]
]
}
}
}
} )

Output:

[
{
_id: ObjectId("63f658d45e5eefbdfef81ca4"),
loc: { type: 'Point', coordinates: [ -106.31, 35.65 ] },
state: 'New Mexico',
country: 'United States',
name: 'Horizons Gas Station'
}
]

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Query for Locations within a Circle on a Sphere