points or a fixed neighbourhood size. This tool is currently configured to perform the later only, using a FixedRadiusSearch structure. Using a fixed number of neighbours will require use of a KD-tree structure. I've been testing one Rust KD-tree library but its performance does not appear to be satisfactory compared to the FixedRadiusSearch. I will need to explore other options here.

Another change that will need to be implemented is the use of a nodal function. The original Whitebox GAT tool allows for use of a constant or a quadratic. This tool only allows the former.

## Function Signature

`def idw_interpolation(self, points: Vector, field_name: str = "FID", use_z: bool = False, weight: float = 2.0, radius: float = 0.0, min_points: int = 0, cell_size: float = 0.0, base_raster: Raster = None) -> Raster: ...`

## Project Links

WbW Homepage User Manual Support WbW