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Site Relation
Status: Abandoned (inactive)
Proposed by: Jojo4u
Tagging: type=site
Applies to: relation
Definition: A way to group features which belong together but cannot be adequately described by an area/multipolygon.
Drafted on: 2008-01-02
RFC start: 2010-02-01


This proposal was created by User:Milliams with significant editioral work by User:Joshdoe. In 2015/2016 User:Jojo4u developed the proposal further towards the principle only when not representable as area. A version of the original proposal from 2013 can be found here.


A way to group features (represented by nodes/ways/areas/relations) which belong together but cannot be adequately described by an area/multipolygon. A common example are dispersed power plants like wind, tidal and photovoltaic power plants which are mapped as nodes. This relation is understood to group man-made objects. For groups of natural objects which share the same name see proposed relation Cluster.

However, this relation is not to be used in cases where the elements are inside one or more areas where the perimeter can be tagged with an appropriate area area tag. For example the tag amenity=school describes the perimeter of the school grounds, for schools with multiple sites the multipolygon relation should be used. For an university with buildings scattered throughout the city a multipolygon amenity=university with the buildings as role outer should be used.

The features should have a close geographic relationship, usually within the same town. For example do not use this relation to group all restaurants of a fast-food chain. Use a a combination of name=*/operator=*/network=* to group loosely coupled and/or widely distributed features - relations are not categories!

Reasons for Area/Multipolygon Insufficiency


Key Value notes statistics
type site
* * The main tag - whatever feature the site relation describes. E.g. amenity=university, site=parking, power=plant.
name * The name of the feature
site * Legacy tag describing the type of the site, better use the full tag (main tag). Existing usage may continue. Might also be used for new sites if no suitable full tag exists.


Way or Node Role Recurrence? Discussion
node way area relation none zero or more Anything you want to tag as part of the site. e.g. buildings, parking entrances, power generators, (looking for more examples).
closed way perimeter zero or one see sub-proposal Proposed_features/Site_Perimeter
entrance zero or more Node(s) on the perimeter defining the entrances to the site. Removed since perimeter around whole site is contradicting this proposal


Feature Tag Statistics Example
University/ type=site
+ amenity=university
at most ~1500 (2015-08) relation University: DHBW Stuttgart tagged as multipolygon for now, future depends on [1]

Documented Uses

Feature Tag Statistics Example
Dispersed facilities power plants like wind, tidal and photovoltaic power plants. type=site
+ power=plant
up to 436 (2015-08) relation Høg-Jæren Energipark
Parking sites type=site
+ site=parking
relation Parkhaus Liederhalle/Bosch-Areal
Heritage site
Historical Objects Map
+ heritage=*
at most ~1000 (2015-08) relation Weißenhofsiedlung
Historic site
Historical Objects Map
+ historic=*
at most ~3800 (2015-08) relation Festung Torgau
French survey point site (IGN import) type=site
+ site=geodesic
relation Le Bélieu I

Documented Uses (incompatible with current definition)

Feature Tag Problem Statistics Example
UK NaPTAN type=site
+ site=stop_area
partial import, should migrate to public_transport=stop_area relation Bridgtown. Watling Street. Cross Street
South Africa shopping areas type=site
+ site=mall
most representable as area relation Queensburgh Shopping Centre
Piste site (rejected) type=site
+ site=piste
tagging as area preferred by some, issue open relation Meiringen - Hasliberg
Camp site (proposed) type=site
+ site=camp_site
most representable as area relation La Rocca
Playground site (rarely used) type=site
+ site=playground
most representable as area which enclose the equipment


2015-08: 135 392 total, 48 476 NAPTAN, 72 586 IGN, 14 330 other uses.
2016-04: 136 829 total, 48 103 NAPTAN, 72 578 IGN, 16 148 other uses.


See Also

Proposed_features/Site_Perimeter sub-proposal bringing areas to the relation.


Discussion on the Talk page.

"Feature Proposal - RFC - Site Relation" from 2011 on the tagging mailing list.
"Feature Proposal - RFC - Site Relation" from 2015.