# Generate tree cover
<!-- <div class="algorithm-id">
<strong>Algorithm ID</strong>: <code>hedgetools:generatetreecoverlidar</code>
</div> -->
```{container} algorithm-id
**Algorithm ID**: `hedgetools:generatetreecoverlidar`
```

This tool generates a tree cover raster and vector layer using a classified point cloud layer.
The vector layer is generated from the sieved raster if a sieve operation is performed.

## Parameters

| Label | Name | Type | Description |
|-------|------|------|-------------|
| Input point cloud layer | `LAS` | [point cloud] | Classified point cloud layer |
| Vegetation category to use | `CATEGORY` | [enumeration] <br> Default: [1,2] | Vegetation category to use: <ul><li>0: **Low vegetation [0-0.5m]** – may create noise.</li><li>1: **Medium vegetation [0.5-1.5m]**.</li><li>3: **High vegetation [1.5m - +]**</li></ul> |
| Extent of the study area <br> Optional | `EXTENT` | [extent] | Input extent from a layer, canvas, or other source to clip the rasters. |
| Compute sieved tree cover mask | `SIEVE` | [boolean] <br> Default: True | If enabled, the tree cover mask is sieved to remove small holes. Recommended to reduce noise in vegetation layers. |
| Threshold sieve value (pixel number) | `THRESHOLD_SIEVE` | [numeric: integer] <br> Default: 100 | Minimum number of pixels for a feature to be kept in the sieved mask. |
| Output resolution (meters) <br> Optional | `RESOLUTION` | [numeric: double] <br> Default: 1.0 | Change the output raster resolution to the desired value. |
| Output tree cover raster | `OUTPUT_TREE_COVER` | [raster] <br> Default: `[Create temporary layer]` | Output raster. |
| Output sieve tree cover raster | `OUTPUT_SIEVE` | [raster] <br> Default: `[Create temporary layer]` | Output raster. |
| Output vector tree cover | `OUTPUT_VECTOR` | [vector: polygon] <br> Default: `[Create temporary layer]` | Polygon vector layer. |

## Outputs

| Label | Name | Type | Description |
|-------|------|------|-------------|
| Output tree cover raster | `OUTPUT_TREE_COVER` | [raster] | Tree cover raster representing the selected vegetation categeories. |
| Output sieve tree cover raster | `OUTPUT_SIEVE` | [raster] | Tree cover raster with small holes removed based on the sieve threshold. |
| Output vector tree cover | `OUTPUT_VECTOR` | [vector: polygon] | Vectorized tree cover used in subsequent algorithms. |