man osmium-renumber (1): renumber object IDs

SYNOPSIS

osmium renumber [OPTIONS] OSM-DATA-FILE

DESCRIPTION

The objects (nodes, ways, and relations) in an OSM file often have very large IDs. This can make some kinds of postprocessing difficult. This command will renumber all objects using IDs starting at 1. Referential integrity will be kept. All objects which appear in the source file will be in the same order in the output file. IDs of objects which are not in the file but referenced from ways or relations are not guaranteed to be in the correct order.

This command expects the input file to be ordered in the usual way: First nodes in order of ID, then ways in order of ID, then relations in order of ID. The input file will be read twice, so it will not work with STDIN.

You must never upload the data generated by this command to OSM! This would really confuse the OSM database because it knows the objects under different IDs.

OPTIONS

-i, --index-directory=DIR

Directory where the index files for mapping between old and news IDs are read from and written to, respectively. Use this if you want to map IDs in several OSM files. Without this option, the indexes are not read from or written to disk. The directory must exist. Use '.' for the current directory. The files written will be named nodes.idx, ways.idx, and relations.idx.

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 renumber 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 renumber needs quite a bit of main memory to keep the mapping between old and new IDs. It is intended for small to medium sized extracts. You will need more than 32 GB RAM to run this on a full planet.

Memory use is at least 8 bytes per node, way, and relation ID in the input file.

EXAMPLES

Renumber a PBF file and output to a compressed XML file:

osmium renumber -o ch.osm.bz2 germany.osm.pbf

Renumbering Germany currently (spring 2016) takes less than three minutes and needs about 3 GB RAM.

Renumber an OSM file storing the indexes on disk:

osmium renumber -i. -o renumbered.osm data.osm

then rewrite a change file, too:

osmium renumber -i. -o renumbered.osc changes.osc

COPYRIGHT

License GPLv3+: GNU GPL version 3 or later <http://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 <[email protected]>.