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- $minDistance
$minDistance¶
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Definition¶
-
$minDistance
¶ New in version 2.6.
Filters the results of a geospatial
$near
or$nearSphere
query to those documents that are at least the specified distance from the center point.$minDistance
is available for use with 2dsphere index only.If
$near
or$nearSphere
query specifies the center point as a GeoJSON point, specify the distance as a non-negative number in meters.If
$nearSphere
query specifies the center point as legacy coordinate pair, specify the distance as a non-negative number in radians.$near
can only use the 2dsphere index if the query specifies the center point as a GeoJSON point.
Examples¶
Use with $near
¶
Important
Specify coordinates in this order: “longitude, latitude.”
Consider a collection places
that has a 2dsphere
index.
The following example returns documents that are at least 1000
meters from and at most 5000
meters from the specified GeoJSON
point, sorted from nearest to farthest:
Use with $nearSphere
¶
Consider a collection places
that contains documents with a
location
field and has a 2dsphere index.
Then, the following example returns whose location
is at least
1000
meters from and at most 5000
meters from the specified
point, ordered from nearest to farthest:
For an example that specifies the center point as legacy coordinate
pair, see $nearSphere