.TH "OSMIUM-CAT" "1" "1.10.0" "" ""
.SH NAME
.PP
osmium\-cat \- concatenate OSM files and convert to different formats
.SH SYNOPSIS
.PP
\f[B]osmium cat\f[] [\f[I]OPTIONS\f[]] \f[I]OSM\-FILE\f[]\&...
.SH DESCRIPTION
.PP
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.
.PP
Because this program supports several different input and output
formats, it can be used to convert OSM files from one format into
another.
.PP
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.
.SH OPTIONS
.TP
.B \-t, \[en]object\-type=TYPE
Read only objects of given type (\f[I]node\f[], \f[I]way\f[],
\f[I]relation\f[], \f[I]changeset\f[]).
By default all types are read.
This option can be given multiple times.
.RS
.RE
.SH COMMON OPTIONS
.TP
.B \-h, \[en]help
Show usage help.
.RS
.RE
.TP
.B \-v, \[en]verbose
Set verbose mode.
The program will output information about what it is doing to STDERR.
.RS
.RE
.TP
.B \[en]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.
.RS
.RE
.TP
.B \[en]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.
.RS
.RE
.SH INPUT OPTIONS
.TP
.B \-F, \[en]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 \f[B]osmium\-file\-formats\f[](5) or the libosmium manual for
details.
.RS
.RE
.SH OUTPUT OPTIONS
.TP
.B \-f, \[en]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 \f[B]osmium\-file\-formats\f[](5) or the libosmium manual for
details.
.RS
.RE
.TP
.B \[en]fsync
Call fsync after writing the output file to force flushing buffers to
disk.
.RS
.RE
.TP
.B \[en]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 \[lq]\f[I]osmium/\f[]\[rq] and the version of osmium.
.RS
.RE
.TP
.B \-o, \[en]output=FILE
Name of the output file.
Default is `\-' (STDOUT).
.RS
.RE
.TP
.B \-O, \[en]overwrite
Allow an existing output file to be overwritten.
Normally \f[B]osmium\f[] will refuse to write over an existing file.
.RS
.RE
.TP
.B \[en]output\-header=OPTION=VALUE
Add output header option.
This command line option can be used multiple times for different
OPTIONs.
See the \f[I]libosmium manual\f[] for a list of available header
options.
.RS
.RE
.SH DIAGNOSTICS
.PP
\f[B]osmium cat\f[] exits with exit code
.TP
.B 0
if everything went alright,
.RS
.RE
.TP
.B 1
if there was an error processing the data, or
.RS
.RE
.TP
.B 2
if there was a problem with the command line arguments.
.RS
.RE
.SH MEMORY USAGE
.PP
\f[B]osmium cat\f[] does all its work on the fly and doesn't keep much
data in main memory.
.SH EXAMPLES
.PP
Convert a PBF file to a compressed XML file:
.IP
.nf
\f[C]
osmium\ cat\ \-o\ out.osm.bz2\ in.osm.pbf
\f[]
.fi
.PP
Concatenate all change files in the `changes' directory into one:
.IP
.nf
\f[C]
osmium\ cat\ \-o\ all\-changes.osc.gz\ changes/*.osc.gz
\f[]
.fi
.PP
Copy nodes and ways from source to destination file:
.IP
.nf
\f[C]
osmium\ cat\ \-o\ dest.osm.pbf\ source.osm.pbf\ \-t\ node\ \-t\ way
\f[]
.fi
.SH SEE ALSO
.IP \[bu] 2
\f[B]osmium\f[](1), \f[B]osmium\-file\-formats\f[](5)
.IP \[bu] 2
Osmium website (https://osmcode.org/osmium-tool/)
.SH COPYRIGHT
.PP
Copyright (C) 2013\-2018 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.
.SH CONTACT
.PP
If you have any questions or want to report a bug, please go to
https://osmcode.org/contact.html
.SH AUTHORS
Jochen Topf <jochen@topf.org>.