mask_to_polygons#

mask_to_polygons(mask: ndarray, transform: Optional[Affine] = None) Iterator[BaseGeometry][source]#

Polygonize a raster mask. Wrapper around rasterio.features.shapes.

Parameters
  • mask (np.ndarray) – The mask containing buildings to polygonize.

  • transform (Optional[rio.Affine]) – Affine transform to use during polygonization. Defaults to None (i.e. identity transform).

Returns

Generator of shapely polygons.

Return type

Iterator[BaseGeometry]