sertit.rasters_rio.sieve¶
- sieve(array: Union[numpy.ma.core.MaskedArray, numpy.ndarray], out_meta: dict, sieve_thresh: int, connectivity: int = 4) -> (typing.Union[numpy.ma.core.MaskedArray, numpy.ndarray], <class 'dict'>)[source]¶
Sieving, overloads rasterio function with raster shaped like (1, h, w).
Forces the output to np.uint8 (as only classified rasters should be sieved)
>>> raster_path = "path\to\raster.tif" # classified raster >>> # Read raster >>> raster, meta = read(raster_path) >>> # Rewrite it >>> sieved, sieved_meta = sieve(raster, meta, sieve_thresh=20) >>> # Write it >>> raster_out = "path\to\raster_sieved.tif" >>> write(sieved, raster_out, sieved_meta)
- Parameters
- Returns
Sieved array and updated meta
- Return type
(Union[np.ma.masked_array, np.ndarray], dict)