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$centerSphere![](/docs/v5.2/assets/link.svg)
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Definition![](/docs/v5.2/assets/link.svg)
$centerSphere
Defines a circle for a geospatial query that uses spherical geometry. The query returns documents that are within the bounds of the circle. You can use the
$centerSphere
operator on both GeoJSON objects and legacy coordinate pairs.To use
$centerSphere
, specify an array that contains:The grid coordinates of the circle's center point, and
The circle's radius measured in radians. To calculate radians, see Calculate Distance Using Spherical Geometry.
{ <location field>: { $geoWithin: { $centerSphere: [ [ <x>, <y> ], <radius> ] } } } Important
If you use longitude and latitude, specify longitude first.
Behavior![](/docs/v5.2/assets/link.svg)
Applications can use $centerSphere
without having a geospatial index.
However, geospatial indexes support much faster queries than the
unindexed equivalents.
Both 2dsphere and 2d
geospatial indexes support $centerSphere
.
Example![](/docs/v5.2/assets/link.svg)
The following example queries grid coordinates and returns all
documents within a 10 mile radius of longitude 88 W
and latitude
30 N
. The query converts the distance to radians by dividing by the
approximate equatorial radius of the earth, 3963.2 miles:
db.places.find( { loc: { $geoWithin: { $centerSphere: [ [ -88, 30 ], 10/3963.2 ] } } } )