---
title: geo.ST_DWithin() function
description: >
  `geo.ST_DWithin()` tests if the specified region is within a defined distance from
  the specified GIS geometry and returns `true` or `false`.
menu:
  flux_v0_ref:
    name: geo.ST_DWithin
    parent: experimental/geo
    identifier: experimental/geo/ST_DWithin
weight: 201
flux/v0/tags: [geotemporal]
introduced: 0.78.0
---

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`geo.ST_DWithin()` tests if the specified region is within a defined distance from
the specified GIS geometry and returns `true` or `false`.



##### Function type signature

```js
(distance: A, geometry: B, region: C, ?units: {distance: string}) => bool where A: Comparable + Equatable, B: Record, C: Record
```

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For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
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## Parameters

### region
({{< req >}})
Region to test. Specify record properties for the shape.



### geometry
({{< req >}})
GIS geometry to test. Can be either point or linestring geometry.



### distance
({{< req >}})
Maximum distance allowed between the region and geometry.
Define distance units with the `geo.units` option.



### units

Record that defines the unit of measurement for distance.
Default is the `geo.units` option.