NAME

       gdal_sieve - Removes small raster polygons.

SYNOPSIS

          gdal_sieve.py [-q] [-st threshold] [-4] [-8] [-o name=value]
                  srcfile [-nomask] [-mask filename] [-of format] [dstfile]

DESCRIPTION

       gdal_sieve.py  script  removes  raster polygons smaller than a provided threshold size (in
       pixels) and replaces them with the pixel value  of  the  largest  neighbour  polygon.  The
       result can be written back to the existing raster band, or copied into a new file.

       The  input  dataset  is  read  as  integer data which means that floating point values are
       rounded to integers. Re-scaling source data may be necessary in some  cases  (e.g.  32-bit
       floating point data with min=0 and max=1).

       Additional details on the algorithm are available in the GDALSieveFilter() docs.

AUTHOR

       Frank Warmerdam <warmerdam@pobox.com>

COPYRIGHT

       1998-2021

                                           Dec 27, 2021                             GDAL_SIEVE(1)