> ## Documentation Index
> Fetch the complete documentation index at: https://docs.wherobots.com/llms.txt
> Use this file to discover all available pages before exploring further.
# ST_DWithin
Returns true if 'leftGeometry' and 'rightGeometry' are within a specified 'distance'.
If `useSpheroid` is passed true, ST\_DWithin uses Sedona's ST\_DistanceSpheroid to check the spheroid distance between the centroids of two geometries. The unit of the distance in this case is meter.
If `useSpheroid` is passed false, ST\_DWithin uses Euclidean distance and the unit of the distance is the same as the CRS of the geometries. To obtain the correct result, please consider using ST\_Transform to put data in an appropriate CRS.
If useSpheroid is not given, it defaults to false
`ST_DWithin` also accepts two `Box2D` inputs — `ST_DWithin(a: Box2D, b: Box2D, distance: Double)` — returning true if the minimum planar (Euclidean) distance between the two rectangles is at most `distance`. This uses closed-interval semantics, so overlapping or edge/corner-touching boxes have distance `0` and match any non-negative radius. It throws `IllegalArgumentException` on inverted bounds. Between two `Box2D` columns the predicate routes through Sedona's distance-join planner — see [Box2D spatial join](/reference/wherobots-db/geometry-data/optimizer#box2d-spatial-join).
## Signatures
```sql theme={"system"}
ST_DWithin (leftGeometry: Geometry, rightGeometry: Geometry, distance: Double, useSpheroid: Optional(Boolean) = false)
```
```sql theme={"system"}
ST_DWithin (a: Box2D, b: Box2D, distance: Double)
```
## Parameters
The left geometry value.
The right geometry value.
The distance value.
Whether to use spheroidal distance calculation. Defaults to `false`.
## Return type
Returns `true` or `false`.
## Examples
```sql theme={"system"}
SELECT ST_DWithin(ST_GeomFromWKT('POINT (0 0)'), ST_GeomFromWKT('POINT (1 0)'), 2.5)
```
```
true
```
```text theme={"system"}
Check for distance between New York and Seattle (< 4000 km)
```
```sql theme={"system"}
SELECT ST_DWithin(ST_GeomFromWKT(-122.335167 47.608013), ST_GeomFromWKT(-73.935242 40.730610), 4000000, true)
```
```
true
```
Box2D example — two rectangles within 1.0 of each other:
```sql theme={"system"}
SELECT ST_DWithin(
ST_MakeBox2D(ST_Point(0.0, 0.0), ST_Point(10.0, 10.0)),
ST_MakeBox2D(ST_Point(11.0, 0.0), ST_Point(12.0, 1.0)),
1.0)
```
```
true
```