This tool normalizes an input LiDAR point cloud (`input`) such that point z-values in the output LAS file (`output`) are converted from elevations to heights above the ground, specifically the height above the nearest ground-classified point. The input LAS file must have ground-classified points, otherwise the tool will return an error. The lidar_tophat_transform tool can be used to perform the normalization if a ground classification is lacking.

## See Also

lidar_tophat_transform

## Function Signature

`def height_above_ground(self, input: Lidar) -> Lidar: ...`

## Project Links

WbW Homepage User Manual Support WbW