1OSMIUM-MERGE-CHANGES(1)                                OSMIUM-MERGE-CHANGES(1)
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NAME

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

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

12       Merges  the  content of all change files given on the command line into
13       one large change file.
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15       Objects are sorted by type, ID, version, and timestamp  so  it  doesn’t
16       matter  in  what order the change files are given or in what order they
17       contain the data.  (If you are using change files of extracts  this  is
18       not  necessarily true and you must specify the change files on the com‐
19       mand line in the correct order from oldest to newest.  This is  because
20       change  files  from extracts can contain multiple different object ver‐
21       sions with the same version and timestamp!)
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23       This commands reads its input file(s) only once and writes  its  output
24       file  in  one go so it can be streamed, ie.  it can read from STDIN and
25       write to STDOUT.
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OPTIONS

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

35       -h, --help
36              Show usage help.
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38       -v, --verbose
39              Set  verbose  mode.   The  program will output information about
40              what it is doing to STDERR.
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42       --progress
43              Show progress bar.  Usually a progress bar is only displayed  if
44              STDOUT  and  STDERR  are detected to be TTY.  With this option a
45              progress bar is always shown.  Note that  a  progress  bar  will
46              never be shown when reading from STDIN or a pipe.
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48       --no-progress
49              Do  not  show progress bar.  Usually a progress bar is displayed
50              if STDOUT and STDERR are detected to be a TTY.  With this option
51              the  progress  bar is suppressed.  Note that a progress bar will
52              never be shown when reading from STDIN or a pipe.
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INPUT OPTIONS

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

63       -f, --output-format=FORMAT
64              The format of the output file.  Can be used to  set  the  output
65              file  format  if  it  can’t be autodetected from the output file
66              name.  See osmium-file-formats(5) or the  libosmium  manual  for
67              details.
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69       --fsync
70              Call  fsync after writing the output file to force flushing buf‐
71              fers to disk.
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73       --generator=NAME
74              The name and version of the program generating the output  file.
75              It  will  be added to the header of the output file.  Default is
76osmium/” and the version of osmium.
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78       -o, --output=FILE
79              Name of the output file.  Default is `-' (STDOUT).
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81       -O, --overwrite
82              Allow an existing output file to be overwritten.   Normally  os‐
83              mium will refuse to write over an existing file.
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85       --output-header=OPTION=VALUE
86              Add  output header option.  This command line option can be used
87              multiple times for different OPTIONs.   See  the  osmium-output-
88              headers(5) man page for a list of available header options.  For
89              some commands you can use the special format “OPTION!” (ie.   an
90              exclamation  mark  after the OPTION and no value set) to set the
91              value to the same as in the input file.
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DIAGNOSTICS

94       osmium merge-changes exits with exit code
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96       0      if everything went alright,
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98       1      if there was an error processing the data, or
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100       2      if there was a problem with the command line arguments.
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MEMORY USAGE

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

108       Merge all changes in changes directory into all.osc.gz:
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110              osmium merge-changes -o all.osc.gz changes/*.gz
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112       Because osmium merge-changes sorts its input, you can also  use  it  to
113       sort just a single change file:
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115              osmium merge-changes unsorted.osc.gz -o sorted.osc.gz
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SEE ALSO

118osmium(1),  osmium-file-formats(5), osmium-output-headers(5), osmium-
119         merge(1)
120
121       • Osmium website (https://osmcode.org/osmium-tool/)
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124       Copyright (C) 2013-2022 Jochen Topf <jochen@topf.org>.
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126       License  GPLv3+:  GNU  GPL  version  3  or  later  <https://gnu.org/li
127       censes/gpl.html>.   This  is  free software: you are free to change and
128       redistribute it.  There is NO WARRANTY, to the extent permitted by law.
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CONTACT

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

135       Jochen Topf <jochen@topf.org>.
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139                                    1.14.0             OSMIUM-MERGE-CHANGES(1)
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