gdalmove - Online in the Cloud

PROGRAM:

NAME

gdalmove - gdalmove.py Transform georeferencing of raster file in place

SYNOPSIS

gdalmove.py [-s_srs <srs_defn>] -t_srs <srs_defn>
[-et <max_pixel_err>] target_file

DESCRIPTION

The gdalmove.py script transforms the bounds of a raster file from one coordinate system
to another, and then updates the coordinate system and geotransform of the file. This is
done without altering pixel values at all. It is loosely similar to using gdalwarp to
transform an image but avoiding the resampling step in order to avoid image damage. It is
generally only suitable for transformations that are effectively linear in the area of the
file.

If no error threshold value (-et) is provided then the file is not actually updated, but
the errors that would be incurred are reported. If -et is provided then the file is only
modify if the apparent error being introduced is less than the indicate threshold (in
pixels).

Currently the transformed geotransform is computed based on the transformation of the top
left, top right, and bottom left corners. A reduced overall error could be produced using
a least squares fit of at least all four corner points.

-s_srs srs_defn:

Override the coordinate system of the file with the indicated coordinate system
definition. Optional. If not provided the source coordinate system is read from the source
file.

-t_srs srs_defn:

Defines the target coordinate system. This coordinate system will be written to the file
after an update.

-et max_pixel_err:

The error threshold (in pixels) beyond which the file will not be updated. If not provided
no update will be applied to the file, but errors will be reported.

target_file
The file to be operated on. To update this must be a file format that supports in
place updates of the geotransform and SRS.

AUTHORS

Frank Warmerdam warmerdam@pobox.com

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