/*! \page gdal_edit gdal_edit.py

Edit in place various information of an existing GDAL dataset

\section gdal_edit_synopsis SYNOPSIS

\verbatim
gdal_edit [--help-general] [-ro] [-a_srs srs_def] [-a_ullr ulx uly lrx lry]
          [-tr xres yres] [-unsetgt] [-a_nodata value] [-unsetnodata]
          [-unsetstats] [-stats] [-approx_stats]
          [-gcp pixel line easting northing [elevation]]*
          [-unsetmd] [-oo NAME=VALUE]* [-mo "META-TAG=VALUE"]*  datasetname
\endverbatim

\section gdal_edit_description DESCRIPTION

The gdal_edit.py script can be used to edit in place various information
of an existing GDAL dataset (projection, geotransform, nodata, metadata).

It works only with raster formats that support update access to
existing datasets.
<dl>

<dt> <b>--help-general</b></dt>:<dd>
Gives a brief usage message for the generic GDAL commandline options 
and exit.
</dd>

<dt> <b>-ro</b></dt>:<dd> (GDAL >= 1.11)
Open the dataset in read-only. Might be useful for drivers refusing to
use the dataset in update-mode. In which case, updated information will go
into PAM .aux.xml files.</dd>

<dt> <b>-a_srs</b> <i>srs_def</i>:</dt><dd>

Defines the target coordinate system.  This coordinate system will be
written to the dataset.

<dt> <b>-a_ullr</b> <i>ulx uly lrx lry</i>:</dt><dd>
Assign/override the georeferenced bounds of the dataset.</dd>

<dt> <b>-tr</b> xres yres :</dt><dd>
Set target resolution. The values must be expressed in georeferenced units.
Both must be positive values.</dd>

<dt> <b>-unsetgt</b></dt>:<dd>
Remove the georeference information.</dd>

<dt> <b>-unsetstats</b></dt>:<dd> (GDAL >= 2.0)
Remove band statistics information.</dd>

<dt> <b>-stats</b></dt>:<dd> (GDAL >= 2.0)
Calculate and store band statistics.</dd>

<dt> <b>-approx_stats</b></dt>:<dd> (GDAL >= 2.0)
Calculate and store approximate band statistics.</dd>

<dt> <b>-a_nodata</b> <i>value</i>:</dt><dd>
Assign a specified nodata value to output bands.</dd>

<dt> <b>-unsetnodata</b></dt>:<dd> (GDAL >= 2.1)
Remove existing nodata values.</dd>

<dt> <b>-gcp</b> <i>pixel line easting northing [elevation]</i>:</dt><dd>
Add the indicated ground control point to the dataset.  This option 
may be provided multiple times to provide a set of GCPs. 
</dd>

<dt> <b>-unsetmd</b></dt>:<dd> (GDAL >= 2.0)
Remove existing metadata (in the default metadata domain). Can be combined
with -mo.</dd>

<dt> <b>-mo</b> <i>"META-TAG=VALUE"</i>:</dt><dd> Passes a metadata key and
value to set on the output dataset if possible. This metadata is added to
the existing metadata items, unless -unsetmd is also specified.</dd>

<dt> <b>-oo</b> <i>"NAME=VALUE"</i>:</dt><dd> 
(GDAL >= 2.0) Open option (format specific).</dd>

</dl>

-a_ullr, -tr and -unsetgt options are exclusive.

-unsetstats and either -stats or -approx_stats options are exclusive.

\section gdal_edit_example EXAMPLE

\verbatim
gdal_edit -mo DATUM=WGS84 -mo PROJ=GEODETIC -a_ullr 7 47 8 46 test.ecw
\endverbatim

\if man
\section gdal_edit_author AUTHORS
Even Rouault <even dot rouault at mines dash paris dot org>
\endif
*/