GDAL-RASTER-SIEVE(1) GDAL GDAL-RASTER-SIEVE(1) (NAME) gdal-raster-sieve - 3.11 . (SYNOPSIS) Usage: gdal raster sieve [OPTIONS] Remove small polygons from a raster dataset. Positional arguments: -i, --input Input raster datasets [required] [not available in pipelines] -o, --output Output raster dataset [required] [not available in pipelines] Common Options: -h, --help Display help message and exit --json-usage Display usage as JSON document and exit --config = Configuration option [may be repeated] -q, --quiet Quiet mode (no progress bar or warning message) [not available in pipelines] Options: -f, --of, --format, --output-format Output format ("GDALG" allowed) [not available in pipelines] --co, --creation-option = Creation option [may be repeated] [not available in pipelines] --overwrite Whether overwriting existing output dataset is allowed [not available in pipelines] Mutually exclusive with --append --append Append as a subdataset to existing output [not available in pipelines] Mutually exclusive with --overwrite --mask Use the first band of the specified file as a validity mask (all pixels with a value other than zero will be considered suitable for inclusion in polygons) -b, --band Input band (1-based index) -s, --size-threshold Minimum size of polygons to keep (default: 2) -c, --connect-diagonal-pixels Consider diagonal pixels as connected Advanced Options: --if, --input-format Input formats [may be repeated] [not available in pipelines] --oo, --open-option = Open options [may be repeated] [not available in pipelines] (DESCRIPTION) gdal raster sieve ( ) . (integer) (floating point) . (re-scaling) ( min=0 max=1). gdal raster pipeline ( GDAL 3.12 ). 3.12 . GDALG ( / ) (GDALG OUTPUT (ON-THE-FLY / STREAMED DATASET)) JSON GDALG . GDALG: GDAL Streamed Algorithm (on-the-fly) / (streamed) . : . . (PROGRAM-SPECIFIC OPTIONS) -b, --band ( ) -c, --connect-diagonal-pixels ( ) . (4-connectivity) . (8-connectivity) . --mask : . -s, --size-threshold (: 2) (STANDARD OPTIONS) --append . GTiff -- GeoTIFF File Format GPKG -- GeoPackage raster. . --co, --creation-option = . GeoTIFF . . . --formats . Raster drivers . --if, --input-format / () . . . . . . --oo, --open-option = ( ). . -f, --of, --format, --output-format . : gdal --formats | grep raster | grep rw | sort --overwrite . gdal . (EXIT STATUS) 0 ( ). (EXAMPLES) : . $ gdal raster sieve -b 2 -s 10 input.tif output.tif (AUTHORS) Alessandro Pasotti (COPYRIGHT) 1998-2026 August 18, 2026 GDAL-RASTER-SIEVE(1)