osmium-merge-changes man page

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.

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)

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>.

Referenced By

osmium(1), osmium-apply-changes(1), osmium-merge(1).

1.4.1