> For the complete documentation index, see [llms.txt](https://docs.ellipsis-drive.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ellipsis-drive.com/developers/api-v3/path-vector/vector-layer-projections/add-a-projection.md).

# Add a projection

| **Description** | Adds a projection to the layer.    |
| --------------- | ---------------------------------- |
| **Endpoint**    | `/path/{pathId}/vector/projection` |
| **Method**      | POST                               |

### Access Level Rules

| **Access Level** | edit+ |
| ---------------- | ----- |

### Processing Units

| **Processing units** | 2 |
| -------------------- | - |

### Parameters

<table><thead><tr><th>Name</th><th width="366">Description</th><th>Required</th><th>Default</th></tr></thead><tbody><tr><td><code>pathId</code></td><td>The id of the vector layer.</td><td>true</td><td></td></tr><tr><td><code>epsg</code></td><td>Integer indicating the EPSG code to add.</td><td>true</td><td></td></tr></tbody></table>