NAME

       osmium-cat - concatenate OSM files and convert to different formats

SYNOPSIS

       osmium cat [OPTIONS] OSM-FILE...

DESCRIPTION

       Concatenates  all  input  files and writes the result to the output file.  The data is not
       sorted in any way but strictly copied from input to output.

       Because this program supports several different input and output formats, it can  be  used
       to convert OSM files from one format into another.

       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.

       Usually this is not the right command to merge two or more typical OSM files,  see  osmium
       merge for that.

OPTIONS

       -c, --clean=ATTR
              Clean  the  attribute  (version,  timestamp,  changeset,  uid, user), from the data
              before writing it out again.  The attribute will be set to 0 (the user will be  set
              to  the  empty string).  This option can be given multiple times.  Depending on the
              output format these attributes might show up as 0 or not show up at all.

       -t, --object-type=TYPE
              Read only objects of given type (node, way, relation, changeset).  By  default  all
              types are read.  This option can be given multiple times.

       --buffer-data
              Read  all  input files into memory and only then write out all the data.  This will
              need a lot of memory and is usually slower than a normal copy.  Used for timing the
              reading and writing phase separately.

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  osmium-output-headers(5)  man  page  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 cat 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 cat does all its work on the fly and doesn’t keep much data in main memory.

EXAMPLES

       Convert a PBF file to a compressed XML file:

              osmium cat -o out.osm.bz2 in.osm.pbf

       Concatenate all change files in the `changes' directory into one:

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

       Copy nodes and ways from source to destination file:

              osmium cat -o dest.osm.pbf source.osm.pbf -t node -t way

       Remove changeset, uid, and user from a file to protect personal data:

              osmium cat -c changeset -c uid -c user -o cleaned.osm.pbf data.osm.pbf

SEE ALSO

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

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

COPYRIGHT

       Copyright (C) 2013-2023 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>.

                                              1.15.0                                OSMIUM-CAT(1)