Provided by: gdal-bin_3.9.3+dfsg-1build1_amd64 
NAME
gdaltransform - Transforms coordinates.
SYNOPSIS
gdaltransform [--help] [--help-general]
[-i] [-s_srs <srs_def>] [-t_srs <srs_def>] [-to <NAME>=<VALUE>]...
[-s_coord_epoch <epoch>] [-t_coord_epoch <epoch>]
[-ct <proj_string>] [-order <n>] [-tps] [-rpc] [-geoloc]
[-gcp <pixel> <line> <easting> <northing> [elevation]]...
[-output_xy] [-E] [-field_sep <sep>] [-ignore_extra_input]
[<srcfile> [<dstfile>]]
DESCRIPTION
The gdaltransform utility reprojects a list of coordinates into any supported
projection,including GCP-based transformations.
--help Show this help message and exit
--help-general
Gives a brief usage message for the generic GDAL commandline options and exit.
-s_srs <srs_def>
Set source spatial reference. The coordinate systems that can be passed are
anything supported by the OGRSpatialReference.SetFromUserInput() call, which
includes EPSG PCS and GCSes (i.e. EPSG:4296), PROJ.4 declarations (as above), or
the name of a .prj file containing well known text.
-s_coord_epoch <epoch>
New in version 3.8.
Assign a coordinate epoch, linked with the source SRS. Useful when the source SRS
is a dynamic CRS. Only taken into account if -s_srs is used.
Before PROJ 9.4, -s_coord_epoch and -t_coord_epoch are mutually exclusive, due to
lack of support for transformations between two dynamic CRS.
-t_srs <srs_def>
set target spatial reference. The coordinate systems that can be passed are
anything supported by the OGRSpatialReference.SetFromUserInput() call, which
includes EPSG PCS and GCSes (i.e. EPSG:4296), PROJ.4 declarations (as above), or
the name of a .prj file containing well known text.
-t_coord_epoch <epoch>
New in version 3.8.
Assign a coordinate epoch, linked with the output SRS. Useful when the output SRS
is a dynamic CRS. Only taken into account if -t_srs is used.
Before PROJ 9.4, -s_coord_epoch and -t_coord_epoch are mutually exclusive, due to
lack of support for transformations between two dynamic CRS.
-ct <string>
A PROJ string (single step operation or multiple step string starting with
+proj=pipeline), a WKT2 string describing a CoordinateOperation, or a
urn:ogc:def:coordinateOperation:EPSG::XXXX URN overriding the default
transformation from the source to the target CRS. It must take into account the
axis order of the source and target CRS.
New in version 3.0.
-to <NAME>=<VALUE>
set a transformer option suitable to pass to GDALCreateGenImgProjTransformer2().
-order <n>
order of polynomial used for warping (1 to 3). The default is to select a
polynomial order based on the number of GCPs.
-tps Force use of thin plate spline transformer based on available GCPs.
-rpc Force use of RPCs.
-geoloc
Force use of Geolocation Arrays.
-i Inverse transformation: from destination to source.
-gcp <pixel> <line> <easting> <northing> [<elevation>]
Provide a GCP to be used for transformation (generally three or more are required)
-output_xy
Restrict output to "x y" instead of "x y z"
-ignore_extra_input
New in version 3.9.
Set this flag to avoid extra non-numeric content at end of input lines to be
appended to the output lines.
-E New in version 3.9.
Enable Echo mode, where input coordinates are prepended to the output lines.
-field_sep <sep>
New in version 3.9.
Defines the field separator, to separate different values. It defaults to the
space character.
<srcfile>
Raster dataset with source projection definition or GCPs. If not given, source
projection/GCPs are read from the command-line -s_srs or -gcp parameters.
Note that only the SRS and/or GCPs of this input file is taken into account, and
not its pixel content.
<dstfile>
Raster dataset with destination projection definition.
Coordinates are read as pairs, triples (for 3D,) or (since GDAL 3.0.0,) quadruplets (for
X,Y,Z,time) of numbers per line from standard input, transformed, and written out to
standard output in the same way. All transformations offered by gdalwarp are handled,
including gcp-based ones.
Starting with GDAL 3.9, additional non-numeric content (typically point name) at the end
of an input line will also be appended to the output line, unless the -ignore_extra_input
is added.
Note that input and output must always be in decimal form. There is currently no support
for DMS input or output.
If an input image file is provided, input is in pixel/line coordinates on that image. If
an output file is provided, output is in pixel/line coordinates on that image.
EXAMPLES
Reprojection Example
Simple reprojection from one projected coordinate system to another:
gdaltransform -s_srs EPSG:28992 -t_srs EPSG:31370
177502 311865
Produces the following output in meters in the "Belge 1972 / Belgian Lambert 72"
projection:
244296.724777415 165937.350217148 0
Image RPC Example
The following command requests an RPC based transformation using the RPC model associated
with the named file. Because the -i (inverse) flag is used, the transformation is from
output georeferenced (WGS84) coordinates back to image coordinates.
gdaltransform -i -rpc 06OCT20025052-P2AS-005553965230_01_P001.TIF
125.67206 39.85307 50
Produces this output measured in pixels and lines on the image:
3499.49282422381 2910.83892848414 50
X,Y,Z,time transform
15-term time-dependent Helmert coordinate transformation from ITRF2000 to ITRF93 for a
coordinate at epoch 2000.0
gdaltransform -ct "+proj=pipeline +step +proj=unitconvert +xy_in=deg \
+xy_out=rad +step +proj=cart +step +proj=helmert +convention=position_vector \
+x=0.0127 +dx=-0.0029 +rx=-0.00039 +drx=-0.00011 +y=0.0065 +dy=-0.0002 \
+ry=0.00080 +dry=-0.00019 +z=-0.0209 +dz=-0.0006 +rz=-0.00114 +drz=0.00007 \
+s=0.00195 +ds=0.00001 +t_epoch=1988.0 +step +proj=cart +inv +step \
+proj=unitconvert +xy_in=rad +xy_out=deg"
2 49 0 2000
Produces this output measured in longitude degrees, latitude degrees and ellipsoid height
in meters:
2.0000005420366 49.0000003766711 -0.0222802283242345
Ground control points
Where is the address "370 S. 300 E." in Salt Lake City, given we know some nearby corners'
coordinates?
echo 300 -370 my address | gdaltransform \
-gcp 0 -500 -111.89114803 40.75846686 \
-gcp 0 0 -111.89114717 40.76932606 \
-gcp 500 0 -111.87685039 40.76940631
-111.8825697384 40.761338402 0 my address
AUTHOR
Frank Warmerdam <warmerdam@pobox.com>, Jan Hartmann <j.l.h.hartmann@uva.nl>
COPYRIGHT
1998-2024
Oct 07, 2024 GDALTRANSFORM(1)