GDAL-RASTER-RECLASSIFY(1) GDAL GDAL-RASTER-RECLASSIFY(1)
gdal-raster-reclassify - Reclassify a raster dataset
Added in version 3.11.
Usage: gdal raster reclassify [OPTIONS] <INPUT> <OUTPUT>
Reclassify values in a raster dataset
Positional arguments:
-i, --input <INPUT> Input raster datasets [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]
-q, --quiet Quiet mode (no 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
Mutually exclusive with --append
--append Append as a subdataset to existing output
Mutually exclusive with --overwrite
-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]
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.
Ranges of values can be specified using brackets:
+---------+---------------------------+
|Notation | Meaning |
+---------+---------------------------+
|[a,b] | Closed interval, includes |
| | both a and b |
+---------+---------------------------+
|[a,b) | Left-closed, right-open, |
| | includes a but excludes b |
+---------+---------------------------+
|(a,b] | Left-open, right-closed, |
| | excludes a but includes b |
+---------+---------------------------+
|(a,b) | Open interval, excludes |
| | both a and b |
+---------+---------------------------+
An example file is shown below.
# remap land cover types
0 = 10 # land
[2,4] = 20 # freshwater
1 = 40 # ocean
(4,6] = 50 # forest (excludes 4, includes 5 and 6)
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:
+o input values of 0 will be output as 10
+o input values between 2 and 4 (inclusive) will be output as 20
+o input values of 1 will be output as 40
+o input values between 5 and 6 will be output as 50 (4 is excluded)
+o 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.
-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, --creation-option <NAME>=<VALUE>
Many formats have one or more optional creation options that
can be used to control particulars about the file created. For
instance, 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
options 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 creation 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 apply the specified pipeline in a on-the-fly / streamed way.
Example 1
$ gdal raster reclassify -m "0=10; [2,4]=20; 1=40" -i wbm.tif -o typ.tif
Dan Baston <dbaston@gmail.com>
1998-2026
March 20, 2026 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 datasets [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]
-q, --quiet Quiet mode (no 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
Mutually exclusive with --append
--append Append as a subdataset to existing output
Mutually exclusive with --overwrite
-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.
Ranges of values can be specified using brackets:
+---------+---------------------------+
|Notation | Meaning |
+---------+---------------------------+
|[a,b] | Closed interval, includes |
| | both a and b |
+---------+---------------------------+
|[a,b) | Left-closed, right-open, |
| | includes a but excludes b |
+---------+---------------------------+
|(a,b] | Left-open, right-closed, |
| | excludes a but includes b |
+---------+---------------------------+
|(a,b) | Open interval, excludes |
| | both a and b |
+---------+---------------------------+
An example file is shown below.
# remap land cover types
0 = 10 # land
[2,4] = 20 # freshwater
1 = 40 # ocean
(4,6] = 50 # forest (excludes 4, includes 5 and 6)
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:
+o input values of 0 will be output as 10
+o input values between 2 and 4 (inclusive) will be output as 20
+o input values of 1 will be output as 40
+o input values between 5 and 6 will be output as 50 (4 is excluded)
+o 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, --creation-option <NAME>=<VALUE>
Many formats have one or more optional creation options that
can be used to control particulars about the file created. For
instance, 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
options 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 creation 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 apply 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
1998-2026
March 20, 2026 GDAL-RASTER-RECLASSIFY(1)