KtMongo: MongoDB request DSL/opensavvy.ktmongo.dsl.query/FilterQueryPredicate/geoWithin

geoWithin

abstract fun geoWithin(polygon: Geo.Polygon, crs: Geo.CoordinateReferenceSystem? = null)(source)

Matches documents where a Geo.Point is within the given polygon.

This operator should only be called on fields of type Geo.Point.

Example

class Place(
    val _id: ObjectId,
    val name: String,
    val location: Geo.Point,
    val category: String,
)

places.find {
    Place::location {
        geoWithin(
            Geo.Polygon(
                Geo.Point(Longitude(-73.95), Latitude(40.80)),
                Geo.Point(Longitude(-73.94), Latitude(40.79)),
                Geo.Point(Longitude(-73.97), Latitude(40.79)),
                Geo.Point(Longitude(-79.98), Latitude(40.76)),
                Geo.Point(Longitude(-73.95), Latitude(40.80)),
            )
        )
    }
}

Indexing

This operator does not require a 2d or 2dsphere index. However, such an index is recommended for performance.

Big polygons

For queries that specify a polygon greater with areas greater than a single hemisphere, the default crs results in queries for the complimentary geometry.

In these cases, specify a crs of Geo.CoordinateReferenceSystem.MongoDB. Only single-ringed polygons are supported.

External resources

abstract fun geoWithin(polygons: Geo.MultiPolygon)(source)

Matches documents where a Geo.Point is within the given polygons.

This operator should only be called on fields of type Geo.Point.

Indexing

This operator does not require a 2d or 2dsphere index. However, such an index is recommended for performance.

Big polygons

For queries that specify a polygon greater with areas greater than a single hemisphere, this operator matches the complimentary geometry.