1GDALCOMPARE(1)                       GDAL                       GDALCOMPARE(1)
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NAME

6       gdalcompare -  Compare two images.
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SYNOPSIS

9          gdalcompare.py [-sds] golden_file new_file
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DESCRIPTION

12       The  gdalcompare.py script compares two GDAL supported datasets and re‐
13       ports the differences. In addition  to  reporting  differences  to  the
14       standard output the script will also return the difference count in its
15       exit value.
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17       Image pixels, and various metadata are checked. There is also a byte by
18       byte  comparison  done  which will count as one difference. So if it is
19       only important that the GDAL visible data  is  identical  a  difference
20       count of 1 (the binary difference) should be considered acceptable.
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22       -sds   If  this  flag is passed the script will compare all subdatasets
23              that are part of the dataset, otherwise subdatasets are ignored.
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25       <golden_file>
26              The file that is considered correct, referred to as  the  golden
27              file.
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29       <new_file>
30              The  file  being compared to the golden file, referred to as the
31              new file.
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33       Note that the gdalcompare.py script can also be  called  as  a  library
34       from  python code though it is not typically in the python path for in‐
35       cluding.  The primary entry point is gdalcompare.compare() which  takes
36       a golden gdal.Dataset and a new gdal.Dataset as arguments and returns a
37       difference  count  (excluding  the  binary  comparison).  The  gdalcom‐
38       pare.compare_sds() entry point can be used to compare subdatasets.
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AUTHOR

41       Frank Warmerdam <warmerdam@pobox.com>
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44       1998-2021
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49                                 Mar 24, 2021                   GDALCOMPARE(1)
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