These are used to describe administrative and other boundaries. See the page Boundaries for an introduction on its usage.
|boundary||administrative||Grens Provincie of Gemeente|
|boundary||historic||Historic administrative boundaries, temporarily kept in OSM, along with start_date=* and end_date=* to specify dates of effect. Requires an additional admin_level=*.|
|boundary||maritime|| Grens Watergebied.
Bijvoorbeeld Territoriale wateren.
|boundary||national_park|| Nationaal park
Natuurpark met beschermde status (bijvoorbeeld de Hoge Veluwe).
|boundary||postal_code||Postal code boundaries|
|boundary||religious_administration||An religious administrative boundary. Requires an additional admin_level=*. See: Talk:Key:boundary#Religious authority boundaries.|
|boundary||protected_area|| Beschermd gebied
Voorbeeld "Beschermd Landschaps- of stadsgezicht".
|boundary||user defined||All commonly used values according to Taginfo|
|admin_level||(number)||Applies to boundary=administrative and is usually in the range 1 to 10, except for Germany where it might be 11 – see boundary.|
|border_type||*||To distinguish between types of boundary where admin_level isn't enough. Used in several different ways e.g in maritime contexts.|
|start_date||(date)||Useful if there are competing historic boundaries or the boundary is very recent (or if it will become effective in a near future) and if keeping previous boundaries are still needed separately (including for statistical maps that are based on older boundaries).|
|end_date||(date)||Should be specified for all historic boundaries, or boundaries that will soon become ineffective (and possibly replaced by others) e.g. for administrative territorial subdivision reforms.|
|fire_boundary||yes||Tag fire_boundary used to mark the boundaries of the areas of fire brigades out within the project Karta01.|