Ubuntu Manpage: gdal_translate - Converts raster data between different formats.

Provided by: gdal-bin_3.4.1+dfsg-1build4_amd64

NAME

       gdal_translate - Converts raster data between different formats.

SYNOPSIS

          gdal_translate [--help-general]
              [-ot {Byte/Int16/UInt16/UInt32/Int32/Float32/Float64/
                      CInt16/CInt32/CFloat32/CFloat64}] [-strict]
              [-if format]* [-of format]
              [-b band]* [-mask band] [-expand {gray|rgb|rgba}]
              [-outsize xsize[%]|0 ysize[%]|0] [-tr xres yres]
              [-r {nearest,bilinear,cubic,cubicspline,lanczos,average,rms,mode}]
              [-unscale] [-scale[_bn] [src_min src_max [dst_min dst_max]]]* [-exponent[_bn] exp_val]*
              [-srcwin xoff yoff xsize ysize] [-epo] [-eco]
              [-projwin ulx uly lrx lry] [-projwin_srs srs_def]
              [-a_srs srs_def] [-a_coord_epoch <epoch>]
              [-a_ullr ulx uly lrx lry] [-a_nodata value]
              [-a_scale value] [-a_offset value]
              [-nogcp] [-gcp pixel line easting northing [elevation]]*
              |-colorinterp{_bn} {red|green|blue|alpha|gray|undefined}]
              |-colorinterp {red|green|blue|alpha|gray|undefined},...]
              [-mo "META-TAG=VALUE"]* [-q] [-sds]
              [-co "NAME=VALUE"]* [-stats] [-norat] [-noxmp]
              [-oo NAME=VALUE]*
              src_dataset dst_dataset

DESCRIPTION

The gdal_translate utility can be used to convert raster data between different formats, potentially
performing some operations like subsettings, resampling, and rescaling pixels in the process.

-ot <type>
Force the output image bands to have a specific data type supported by the driver, which may be
one of the following: Byte, UInt16, Int16, UInt32, Int32, Float32, Float64, CInt16, CInt32,
CFloat32 or CFloat64.

-strict
Don't be forgiving of mismatches and lost data when translating to the output format.

-if <format>
Format/driver name to be attempted to open the input file(s). It is generally not necessary to
specify it, but it can be used to skip automatic driver detection, when it fails to select the
appropriate driver. This option can be repeated several times to specify several candidate
drivers.

New in version 3.2.

-of <format>
Select the output format. Starting with GDAL 2.3, if not specified, the format is guessed from the
extension (previously was GTiff). Use the short format name.

-b <band>
Select an input band band for output. Bands are numbered from 1. Multiple -b switches may be used
to select a set of input bands to write to the output file, or to reorder bands. band can also be
set to "mask,1" (or just "mask") to mean the mask band of the first band of the input dataset.

-mask <band>
Select an input band band to create output dataset mask band. Bands are numbered from 1. band can
be set to "none" to avoid copying the global mask of the input dataset if it exists. Otherwise it
is copied by default ("auto"), unless the mask is an alpha channel, or if it is explicitly used to
be a regular band of the output dataset ("-b mask"). band can also be set to "mask,1" (or just
"mask") to mean the mask band of the 1st band of the input dataset.

-expand gray|rgb|rgba
To expose a dataset with 1 band with a color table as a dataset with 3 (RGB) or 4 (RGBA) bands.
Useful for output drivers such as JPEG, JPEG2000, MrSID, ECW that don't support color indexed
datasets. The 'gray' value enables to expand a dataset with a color table that only contains gray
levels to a gray indexed dataset.

-outsize <xsize>[%]|0 <ysize>[%]|0
Set the size of the output file. Outsize is in pixels and lines unless '%' is attached in which
case it is as a fraction of the input image size. If one of the 2 values is set to 0, its value
will be determined from the other one, while maintaining the aspect ratio of the source dataset.

-tr <xres> <yres>
set target resolution. The values must be expressed in georeferenced units. Both must be positive
values. This is mutually exclusive with -outsize and -a_ullr.

-r {nearest (default),bilinear,cubic,cubicspline,lanczos,average,rms,mode}
Select a resampling algorithm.

nearest applies a nearest neighbour (simple sampling) resampler

average computes the average of all non-NODATA contributing pixels. Starting with GDAL 3.1, this
is a weighted average taking into account properly the weight of source pixels not contributing
fully to the target pixel.

rms computes the root mean squared / quadratic mean of all non-NODATA contributing pixels (GDAL >=
3.3)

bilinear applies a bilinear convolution kernel.

cubic applies a cubic convolution kernel.

cubicspline applies a B-Spline convolution kernel.

lanczos applies a Lanczos windowed sinc convolution kernel.

mode selects the value which appears most often of all the sampled points.

-scale [src_min src_max [dst_min dst_max]]
Rescale the input pixels values from the range src_min to src_max to the range dst_min to dst_max.
If omitted the output range is 0 to 255. If omitted the input range is automatically computed
from the source data. Note that these values are only used to compute a scale and offset to apply
to the input raster values. In particular, src_min and src_max are not used to clip input values.
-scale can be repeated several times (if specified only once, it also applies to all bands of the
output dataset), so as to specify per band parameters. It is also possible to use the "-scale_bn"
syntax where bn is a band number (e.g. "-scale_2" for the 2nd band of the output dataset) to
specify the parameters of one or several specific bands.

-exponent <exp_val>
To apply non-linear scaling with a power function. exp_val is the exponent of the power function
(must be positive). This option must be used with the -scale option. If specified only once,
-exponent applies to all bands of the output image. It can be repeated several times so as to
specify per band parameters. It is also possible to use the "-exponent_bn" syntax where bn is a
band number (e.g. "-exponent_2" for the 2nd band of the output dataset) to specify the parameters
of one or several specific bands.

-unscale
Apply the scale/offset metadata for the bands to convert scaled values to unscaled values. It is
also often necessary to reset the output datatype with the -ot switch.

-srcwin <xoff> <yoff> <xsize> <ysize>
Selects a subwindow from the source image for copying based on pixel/line location.

-projwin <ulx> <uly> <lrx> <lry>
Selects a subwindow from the source image for copying (like -srcwin) but with the corners given in
georeferenced coordinates (by default expressed in the SRS of the dataset. Can be changed with
-projwin_srs).

NOTE:
In GDAL 2.1.0 and 2.1.1, using -projwin with coordinates not aligned with pixels will result in
a sub-pixel shift. This has been corrected in later versions. When selecting non-nearest
neighbour resampling, starting with GDAL 2.1.0, sub-pixel accuracy is however used to get
better results.

-projwin_srs <srs_def>
Specifies the SRS in which to interpret the coordinates given with -projwin. The <srs_def> may be
any of the usual GDAL/OGR forms, complete WKT, PROJ.4, EPSG:n or a file containing the WKT.

WARNING:
This does not cause reprojection of the dataset to the specified SRS.

-epo (Error when Partially Outside) If this option is set, -srcwin or -projwin values that falls
partially outside the source raster extent will be considered as an error. The default behavior is
to accept such requests, when they were considered as an error before.

-eco (Error when Completely Outside) Same as -epo, except that the criterion for erroring out is when
the request falls completely outside the source raster extent.

-a_srs <srs_def>
Override the projection for the output file.

The coordinate reference systems that can be passed are anything supported by the
OGRSpatialReference.SetFromUserInput() call, which includes EPSG Projected, Geographic or Compound
CRS (i.e. EPSG:4296), a well known text (WKT) CRS definition, PROJ.4 declarations, or the name of
a .prj file containing a WKT CRS definition.

NOTE:
No reprojection is done.

-a_coord_epoch <epoch>
New in version 3.4.

Assign a coordinate epoch, linked with the output SRS. Useful when the output SRS is a dynamic
CRS.

-a_scale <value>
Set band scaling value (no modification of pixel values is done)

New in version 2.3.

-a_offset<value>
Set band offset value (no modification of pixel values is done)

New in version 2.3.

-a_ullr <ulx> <uly> <lrx> <lry>
Assign/override the georeferenced bounds of the output file. This assigns georeferenced bounds to
the output file, ignoring what would have been derived from the source file. So this does not
cause reprojection to the specified SRS.

-a_nodata <value>
Assign a specified nodata value to output bands. It can be set to none to avoid setting a nodata
value to the output file if one exists for the source file. Note that, if the input dataset has a
nodata value, this does not cause pixel values that are equal to that nodata value to be changed
to the value specified with this option.

New in version 2.3.

New in version 2.3.

-mo META-TAG=VALUE
Passes a metadata key and value to set on the output dataset if possible.

-co <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.

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.

-nogcp Do not copy the GCPs in the source dataset to the output dataset.

-gcp <pixel> <line> <easting> <northing> <elevation>
Add the indicated ground control point to the output dataset. This option may be provided
multiple times to provide a set of GCPs.

-q Suppress progress monitor and other non-error output.

-sds Copy all subdatasets of this file to individual output files. Use with formats like HDF that have
subdatasets.

-stats Force (re)computation of statistics.

-norat Do not copy source RAT into destination dataset.

-noxmp Do not copy the XMP metadata in the source dataset to the output dataset when driver is able to
copy it.

New in version 3.2.

-oo NAME=VALUE
Dataset open option (format specific)

<src_dataset>
The source dataset name. It can be either file name, URL of data source or subdataset name for
multi-dataset files.

<dst_dataset>
The destination file name.

C API

       This utility is also callable from C with GDALTranslate().

       New in version 2.1.

EXAMPLES

          gdal_translate -of GTiff -co "TILED=YES" utm.tif utm_tiled.tif

       To create a JPEG-compressed TIFF with internal mask from a RGBA dataset

          gdal_translate rgba.tif withmask.tif -b 1 -b 2 -b 3 -mask 4 -co COMPRESS=JPEG -co PHOTOMETRIC=YCBCR --config GDAL_TIFF_INTERNAL_MASK YES

       To create a RGBA dataset from a RGB dataset with a mask

          gdal_translate withmask.tif rgba.tif -b 1 -b 2 -b 3 -b mask

AUTHOR

       Frank Warmerdam <warmerdam@pobox.com>, Silke Reimer <silke@intevation.de>

COPYRIGHT

       1998-2021

                                                  Dec 27, 2021                                 GDAL_TRANSLATE(1)