# Map vector style expression

| **Description** | Maps an expression of a vector style to an expression tree. |
| --------------- | ----------------------------------------------------------- |
| **Endpoint**    | `/path/{pathId}/vector/expressionMap`                       |
| **Method**      | POST                                                        |

### Access Level Rules

| **Access Level** | view |
| ---------------- | ---- |

### Processing Units

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

### Parameters

<table><thead><tr><th>Name</th><th width="200">Description</th><th width="150">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>expressionObject</code></td><td>The expression object to map to an expression tree.</td><td>true</td><td></td></tr></tbody></table>