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.

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
              Add output header option.  This option can be given several times.  See the libosmium manual for a
              list of allowed header options.

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 (http://osmcode.org/osmium-tool/)

COPYRIGHT

       Copyright (C) 2013-2017 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 http://osmcode.org/contact.html

AUTHORS

       Jochen Topf <jochen@topf.org>.

                                                      1.7.1                              OSMIUM-MERGE-CHANGES(1)