GDAL_SIEVE(1) GDAL GDAL_SIEVE(1)
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 GDALSieve-
Filter() docs.
AUTHOR
Frank Warmerdam <warmerdam@pobox.com>
COPYRIGHT
1998-2021
Dec 27, 2021 GDAL_SIEVE(1)
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