---
url: >-
  https://adk.nht.io/api/@nhtio/adk/batteries/tools/geo_basics/variables/geoWithinRadiusTool.md
description: Check whether a point lies within a radius of a centre coordinate.
---

# Variable: geoWithinRadiusTool

```ts
const geoWithinRadiusTool: Tool<SpooledArtifact>;
```

Defined in: [batteries/tools/geo\_basics/index.ts:92](https://github.com/NHTIO/ADK/blob/v1.20260605.0/src/batteries/tools/geo_basics/index.ts#L92)

Check whether a point lies within a radius of a centre coordinate.

## Remarks

Uses the haversine distance internally; returns the radius unit chosen by the caller
(km or miles) in the result string.