---
title: "Transform coordinates to another system | Guides"
description: "How to transform coordinates using the MapTiler Coordinates API."
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# Transform coordinates to another system

This page shows how to transform coordinates from one system to another using our [Coordinates API](https://docs.maptiler.com/cloud/api/coordinates/). You can also use this service with the [API client JS](https://docs.maptiler.com/client-js/#transform).

For a beginner intro into the service, see [Work with coordinate systems](https://docs.maptiler.com/guides/location-services/coordinates/).

Key

You need a **MapTiler API key** to use this service. [Get it here](https://cloud.maptiler.com/account/keys/) and [learn how to secure it](https://docs.maptiler.com/guides/credentials/api-key/#secure-key).

The universal transform URL format is:

```text
https://api.maptiler.com/coordinates/transform/{COORDS}.json?s_srs={CODE}&to_srs={CODE}&key=YOUR_MAPTILER_API_KEY_HERE
```

| **Parameters** | **Description** | **Example** |
| --- | --- | --- |
| COORDS | Pair (`x,y`) or triplets (`x,y,x`) of coordinates separated by comma (`,`) | 17,50  
17,50,300 |
| s\_srs | Source coordinate reference system | 4326 |
| t\_srs | Target coordinate reference system definition | 5514 |
| ops | List of coordinate of operations separated by `|` | 1623 |

Example of a coordinate transformation URL call:

```text
https://api.maptiler.com/coordinates/transform/17,50.json?s_srs=4326&t_srs=5514&ops=1623&key=YOUR_MAPTILER_API_KEY_HERE
```

For more details, see the [Coordinates API `Transform` reference](https://docs.maptiler.com/cloud/api/coordinates/#tag/coordinates/GET/coordinates/transform/{coordinates}.json).