NAME

       osmium-merge-changes - merge several OSM change files into one

SYNOPSIS

       osmium merge-changes [OPTIONS] OSM-CHANGE-FILE...

DESCRIPTION

       Merges the content of all change files given on the command line into one large change file.  Objects are
       sorted by type, ID, version, and timestamp so it doesn’t matter in what order the change files are  given
       or in what order they contain the data.

       This  commands  reads  its  input  file(s)  only  once  and writes its output file in one go so it can be
       streamed, ie.  it can read from STDIN and write to STDOUT.

OPTIONS

       -s, --simplify
              Only write the last version of any object to the output.  For an object  created  in  one  of  the
              change  files  and  removed  in  a  later one, the deleted version of the object will still appear
              because it is the latest version.

COMMON OPTIONS

       -h, --help
              Show usage help.

       -v, --verbose
              Set verbose mode.  The program will output information about what it is doing to STDERR.

       --progress
              Show progress bar.  Usually a progress bar is only displayed if STDOUT and STDERR are detected  to
              be  TTY.  With this option a progress bar is always shown.  Note that a progress bar will never be
              shown when reading from STDIN or a pipe.

       --no-progress
              Do not show progress bar.  Usually a progress bar is displayed if STDOUT and STDERR  are  detected
              to  be  a  TTY.   With  this option the progress bar is suppressed.  Note that a progress bar will
              never be shown when reading from STDIN or a pipe.

INPUT OPTIONS

       -F, --input-format=FORMAT
              The format of the input file(s).  Can be used to set the input format if it can’t be  autodetected
              from  the  file name(s).  This will set the format for all input files, there is no way to set the
              format for some input files only.  See osmium-file-formats(5) or the libosmium manual for details.

OUTPUT OPTIONS

       -f, --output-format=FORMAT
              The format of the output file.  Can be used  to  set  the  output  file  format  if  it  can’t  be
              autodetected  from  the  output file name.  See osmium-file-formats(5) or the libosmium manual for
              details.

       --fsync
              Call fsync after writing the output file to force flushing buffers to disk.

       --generator=NAME
              The name and version of the program generating the output file.  It will be added to the header of
              the output file.  Default is “osmium/” and the version of osmium.

       -o, --output=FILE
              Name of the output file.  Default is `-' (STDOUT).

       -O, --overwrite
              Allow  an  existing  output  file to be overwritten.  Normally osmium will refuse to write over an
              existing file.

       --output-header=OPTION=VALUE
              Add output header option.  This command line option can  be  used  multiple  times  for  different
              OPTIONs.   See the libosmium manual for a list of available header options.  For some commands you
              can use the special format “OPTION!” (ie.  an exclamation mark after the OPTION and no value  set)
              to set the value to the same as in the input file.

DIAGNOSTICS

       osmium merge-changes exits with exit code

       0      if everything went alright,

       1      if there was an error processing the data, or

       2      if there was a problem with the command line arguments.

MEMORY USAGE

       osmium  merge-changes  keeps the contents of all the change files in main memory.  This will take roughly
       10 times as much memory as the files take on disk in .osm.bz2 format.

EXAMPLES

       Merge all changes in changes directory into all.osc.gz:

              osmium merge-changes -o all.osc.gz changes/*.gz

       Because osmium merge-changes sorts its input, you can also use it to sort just a single change file:

              osmium merge-changes unsorted.osc.gz -o sorted.osc.gz

SEE ALSO

       • osmium(1), osmium-file-formats(5), osmium-merge(1)

       • Osmium website (https://osmcode.org/osmium-tool/)

COPYRIGHT

       Copyright (C) 2013-2019 Jochen Topf <jochen@topf.org>.

       License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.  This is  free  software:
       you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

CONTACT

       If you have any questions or want to report a bug, please go to https://osmcode.org/contact.html

AUTHORS

       Jochen Topf <jochen@topf.org>.

                                                     1.11.1                              OSMIUM-MERGE-CHANGES(1)