# Haversine distance

Returns the distance between two pairs of GPS latitude and longitude co-ordinates in metres. For example, `51.487263,-0.124323, 38.9517,-77.1467`. Haversine distance lives in the **Others** category of the `fx` menu.

## Parameter

| Parameter | Type   | Required | Default | Description                                            |
| --------- | ------ | -------- | ------- | ------------------------------------------------------ |
| Input     | string | yes      | —       | Value to transform. Previous step output or a literal. |

`Input` is the primary value (previous step output or a literal).

## Returned value

| Type     | Description                                      |
| -------- | ------------------------------------------------ |
| `number` | Result of the Haversine distance transformation. |

## Example

<details>
<summary>Run Haversine distance</summary>

Returns the distance between two pairs of GPS latitude and longitude co-ordinates in metres. Adjust optional parameters when the defaults do not match your payload.

1. Set **Input** to the value to transform (previous step output or a literal).

2. Confirm **Output value** shows the transformed result.

</details>