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NAME

osmium-tags-filter - filter objects matching specified keys/tags

SYNOPSIS

osmium tags-filter [OPTIONS] OSM-FILE FILTER-EXPRESSION...
osmium tags-filter [OPTIONS] --expressions=FILE OSM-FILE

DESCRIPTION

Get objects matching at least one of the specified expressions from the input and write them to the output. Expressions can either be specified on the command line or in an expressions file. See the FILTER EXPRESSIONS section for a description of the filter expression format.

All objects matching the expressions will be read from OSM-FILE and written to the output. All objects referenced from those objects will also be added to the output unless the option -R, --omit-referenced is used. This applies to nodes referenced in ways and members referenced in relations.

If the option -R, --omit-referenced is used, the input file is read only once, otherwise the input file will possibly be read up to three times.

Objects will be written out in the order they are found in the OSM-FILE.

The command will only work correctly on history files if the -R/--omit-referenced option is used.

OPTIONS

-e FILE, --expressions=FILE
Read expressions from the specified file, one per line. Empty lines are ignored. Everything after the comment character (#) is also ignored. See the FILTER EXPRESSIONS section for further details.
-i, --invert-match
Invert the sense of matching. Exclude all objects with matching tags.
-R, --omit-referenced
Omit the nodes referenced from matching ways and members referenced from matching relations.
-t, --remove-tags
Remove tags from objects that are not matching the filter expression but are included to complete references (nodes in ways and members of relations). If an object is both matching the filter and used as a reference it will keep its tags.

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 libosmium manual for a list of available header options.

FILTER EXPRESSIONS

A filter expression specifies a tag or tags that should be found in the data and the type of object (node, way, or relation) that should be matched.

The object type(s) comes first, then a slash (/) and then the rest of the expression. Object types are specified as 'n' (for nodes), 'w' (for ways), 'r' (for relations), and 'a' (for areas - closed ways with 4 or more nodes and relations with type=multipolygon or type=boundary tag). Any combination of them can be used. If the object type is not specified, the expression matches all object types.

Some examples:

n/amenity
Matches all nodes with the key "amenity".
nw/highway
Matches all nodes or ways with the key "highway".
/note
Matches objects of any type with the key "note".
note
Matches objects of any type with the key "note".
w/highway=primary
Matches all ways with the key "highway" and value "primary".
w/highway!=primary
Matches all ways with the key "highway" and a value other than "primary".
r/type=multipolygon,boundary
Matches all relations with key "type" and value "multipolygon" or "boundary".
w/name,name:de=Kastanienallee,Kastanienstrasse
Matches any way with a "name" or "name:de" tag with the value "Kastanienallee" or "Kastanienstrasse".
n/addr:*
Matches all nodes with any key starting with "addr:"
n/name=*Paris
Matches all nodes with a name that contains the word "Paris".
a/building
Matches any closed ways with 4 or more nodes or relations tagged "building". Relations must also have a tag "type=multipolygon" or "type=boundary".

If there is no equal sign ("=") in the expression only keys are matched and values can be anything. If there is an equal sign ("=") in the expression, the key is to the left and the value to the right. An exclamation sign ("!") before the equal sign means: A tag with that key, but not the value(s) to the right of the equal sign. A leading or trailing asterisk ("*") can be used for substring or prefix matching, respectively. Commas (",") can be used to separate several keys or values.

All filter expressions are case-sensitive. There is no way to escape the special characters such as "=", "*" and ",". You can not mix comma-expressions and "*"-expressions.

The filter expressions specified in a file and/or on the command line are matched in the order they are given. To achieve best performance, put expressions expected to match more often first.

Area matches (with leading "a/") do not check whether the matched object is a valid (multi)polygon, they only check whether an object might possibly be turned into a (multi)polygon. This is the case for all closed ways (where the first and last node are the same) with 4 or more nodes and for all relations that have an additional "type=multipolygon" or "type=boundary" tag.

DIAGNOSTICS

osmium tags-filter 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 tags-filter does all its work on the fly and only keeps tables of object IDs it needs in main memory. If the -R/--omit-referenced option is used, no IDs are kept in memory.

EXAMPLES

Get all amenity nodes from the Berlin PBF file:

osmium tags-filter -o amenties.osm.pbf berlin.osm.pbf n/amenity

Get all objects (nodes, ways, or relations) with a note tag:

osmium tags-filter -R -o notes.osm.pbf berlin.osm.pbf note

Get all nodes and ways with a highway tag and all relations tagged with type=restriction plus all referenced objects:

osmium tags-filter -o filtered.osm.pbf planet.osm.pbf \
    nw/highway r/type=restriction

SEE ALSO

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