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GDAL-RASTER-RECLASSIFY(1) GDAL GDAL-RASTER-RECLASSIFY(1) NAME gdal-raster-reclassify - Reclassify a raster dataset Added in version 3.11. SYNOPSIS Usage: gdal raster reclassify [OPTIONS] <INPUT> <OUTPUT> Reclassify values in a raster dataset Positional arguments: -i, --input <INPUT> Input raster dataset [required] -o, --output <OUTPUT> Output raster dataset [required] Common Options: -h, --help Display help message and exit --json-usage Display usage as JSON document and exit --config <KEY>=<VALUE> Configuration option [may be repeated] --progress Display progress bar Options: -f, --of, --format, --output-format <OUTPUT-FORMAT> Output format ("GDALG" allowed) --co, --creation-option <KEY>=<VALUE> Creation option [may be repeated] --overwrite Whether overwriting existing output is allowed -m, --mapping <MAPPING> Reclassification mappings (or specify a @<filename> to point to a file containing mappings [required] --ot, --datatype, --output-data-type <OUTPUT-DATA-TYPE> Output data type. OUTPUT-DATA-TYPE=Byte|Int8|UInt16|Int16|UInt32|Int32|UInt64|Int64|CInt16|CInt32|Float16|Float32|Float64|CFloat32|CFloat64 Advanced Options: --if, --input-format <INPUT-FORMAT> Input formats [may be repeated] --oo, --open-option <KEY>=<VALUE> Open options [may be repeated] DESCRIPTION gdal raster reclassify reclassifies values in an input dataset. A file (or string) specifies the mapping of input pixel values or ranges to output files. An example file is shown below. # remap land cover types 0 = 10 # land [2,4] = 20 # freshwater 1 = 40 # ocean NO_DATA = NO_DATA # leave NoData pixels unmodified (The # character indicates a comment that is ignored by the parser but can make the file easier to read.) In this case: • input values of 0 will be output as 10 • input values between 2 and 4 (inclusive) will be output as 20 • input values of 1 will be output as 40 • NoData values will be preserved as NoData The presence of any other values in the input will cause an error. If this is not desired, the input range DEFAULT can be used to specify an output value for pixels not covered by any other input range. These pixels may be converted unto NoData (DEFAULT = NO_DATA), some other constant value (e.g., DEFAULT = 50), or left unmodified (DEFAULT = PASS_THROUGH). NOTE: gdal raster reclassify supports writing to VRT format; however, VRT files generated in this way can only be opened using GDAL 3.11 or greater. Options -m, --mapping <MAPPING> A definition of mappings between input and output pixel values, as described above. The mappings may either be provided as text (with each entry separate by a semicolon), or they may be read from a file using @filename.txt. --co <NAME>=<VALUE> Many formats have one or more optional creation options that can be used to control particulars about the file created. For in- stance, the GeoTIFF driver supports creation options to control compression, and whether the file should be tiled. May be repeated. The creation options available vary by format driver, and some simple formats have no creation options at all. A list of op- tions supported for a format can be listed with the --formats command line option but the documentation for the format is the definitive source of information on driver creation options. See Raster drivers format specific documentation for legal cre- ation options for each format. -f, --of, --format, --output-format <OUTPUT-FORMAT> Which output raster format to use. Allowed values may be given by gdal --formats | grep raster | grep rw | sort --ot, --datatype, --output-data-type <OUTPUT-DATA-TYPE> Output data type among Byte, Int8, UInt16, Int16, UInt32, Int32, UInt64, Int64, CInt16, CInt32, Float32, Float64, CFloat32, CFloat64. GDALG OUTPUT (ON-THE-FLY / STREAMED DATASET) This program supports serializing the command line as a JSON file using the GDALG output format. The resulting file can then be opened as a raster dataset using the GDALG: GDAL Streamed Algorithm driver, and ap- ply the specified pipeline in a on-the-fly / streamed way. EXAMPLES Example 1 $ gdal raster reclassify -m "0=10; [2,4]=20; 1=40" -i wbm.tif -o typ.tif AUTHOR Dan Baston <dbaston@gmail.com> COPYRIGHT 1998-2025 Jul 12, 2025 GDAL-RASTER-RECLASSIFY(1)
NAME | SYNOPSIS | DESCRIPTION | GDALG OUTPUT (ON-THE-FLY / STREAMED DATASET) | EXAMPLES | AUTHOR | COPYRIGHT
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