NAME

       gdalcompare -  Compare two images.

SYNOPSIS

          gdalcompare.py [-sds] golden_file new_file

DESCRIPTION

       The  gdalcompare.py  script compares two GDAL supported datasets and reports the differences. In addition
       to reporting differences to the standard output the script will also return the difference count  in  its
       exit value.

       Image  pixels,  and various metadata are checked. There is also a byte by byte comparison done which will
       count as one difference. So if it is only important that the GDAL visible data is identical a  difference
       count of 1 (the binary difference) should be considered acceptable.

       -sds   If  this  flag  is  passed  the  script will compare all subdatasets that are part of the dataset,
              otherwise subdatasets are ignored.

       <golden_file>
              The file that is considered correct, referred to as the golden file.

       <new_file>
              The file being compared to the golden file, referred to as the new file.

       Note that the gdalcompare.py script (like all the other scripts) can also be called  as  a  library  from
       python code: from osgeo_utils import gdalcompare.  The primary entry point is gdalcompare.compare() which
       takes a golden gdal.Dataset and a new gdal.Dataset as arguments and returns a difference count (excluding
       the binary comparison). The gdalcompare.compare_sds() entry point can be used to compare subdatasets.

AUTHOR

       Frank Warmerdam <warmerdam@pobox.com>

COPYRIGHT

       1998-2021

                                                  Dec 27, 2021                                    GDALCOMPARE(1)