Boundaries

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Logo. Feature : Boundaries
One example for Feature : Boundaries
Description
Boundaries mark the borders of areas, mostly political, but also of other administrative areas.
Group

Boundaries

Tags

boundary=*

area The original accepted usage was to only apply this tag to areas.

relation+way However there now seems to be a consensus of using the boundary key also on linear ways, with relations used to aggregate these ways if needed.

Also see the boundary relation.

Administrative values

See main article Tag:boundary=administrative

The following values are possible, though might be old due to the new admin_level tag

National

boundary=administrative
+ admin_level=2 

marks country borders, such as the border between Austria and Germany. The names of the countries is specified through the tags "left:country", "right:country", if used on a linear way rather than an enclosed/area way.

There is some controversy about what is the exact meaning of country. For the sake of clarity, only political entities listed on the ISO 3166 standard are to be considered countries.

Subnational

boundary=administrative 
+ admin_level=3 to 11

marks subnational borders. The names of the subnational entities involved is specified as with national borders, with "parish", "district", "region", "province", "state"

Other

boundary=aboriginal_lands
is approved, used for marking official reservation boundaries of recognized aboriginal / indigenous / native peoples
boundary=civil
is approved, but not documented, can somebody check tagwatch for usage?
boundary=maritime
for marking maritime borders (rather than land areas normally assumed by boundary=administrative and following the coastlines)
boundary=metropole
trial: When metropolitan areas don't match with an administrative subdivision (sometimes even country borders are crossed), this tag could be used.
boundary=national
is approved, but not documented, can somebody check tagwatch for usage?
boundary=national_park
an older tag to mark the boundaries of a national park. See also boundary=protected_area, below.
boundary=political
is approved, should be documented in each country where they are used. Can be used for electoral boundaries, or administrative areas not covered by the strict hierarchical model in specific countries (because they don't create exclusive partitions).
boundary=protected_area
a newer tag with a more verbose tagging scheme which can deal with broad categories of protections and protection levels: nature-protected (wilderness, national parks...), resources-protected (soil, water, species...) and social-protected areas (special cultural assets, heritage sites, et cetera).
boundary=religious_administration
trial for dioceses, parishes... First used, discussed and supported in France, but also used now in other countries (see FrViPofm/Tag:boundary=religious_administration)
boundary=vice_county
for marking vice counties in Britain and Ireland.

Proposed values

See also

  • place=* for toponyms, human settlements and fractions of them.

Downloads

  • OSM Boundaries by User Wambacher
  • Cosmogony is a set of tools to extract, see and check administratives boundaries from OSM