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)