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Proposal status: Rejected (inactive)
Proposed by: B-unicycling
Tagging: settlement_type=crannog
Applies to: node, way, relation
Definition: A crannog is a prehistoric artificial island/ islet created for human habitation. In some cases, a modern re-creation for educational purposes.

Draft started: 2022-09-11
RFC start: 2022-09-22
Vote start: 2022-10-07
Vote end: 2022-10-21


It is proposed to use the combination of historic=archaeological_site + site_type=settlement + settlement_type=crannog for historical sites of the crannog (aka crannóg) type. The combination should be used on areas, but if the exact extent is not known, a node can also be used.

[W]crannog (Q91759)


Crannogs are a special type of prehistoric settlement form in the shape of artificial islands in Ireland, Scotland and Wales. Some had castles built on top in the Middle Ages, and some were inhabited as late as the 18th century (AD)[1]. They are found in lakes (water=lake), in wetlands (natural=wetland) and some even off the coast in the sea.

The wikipedia article claims that there are an estimated number of 1,200 in Ireland (110 are recorded in Co. Leitrim alone[2]), and that there 347 listed monuments for Scotland[3]. This would make these heritage features relevant enough to warrant their own tag.

Some of them turn out not to be crannogs after all after archaeological excavations, so it is up to each mapper to make a judgement call to map it as an archaeological site or not depending on the available information.

They can be found through local knowledge or historic maps (for example the British War office map for Ireland shows them).

Some have been re-created in modern times on heritage/ visitor sites and should have that marked with the addition of tourism=attraction.


Prehistoric crannogs can be recognized on satellite imagery as an island with a circular (tree) outline or as circular features in the water. Reconstructed crannogs usually have one or more roof:material=thatch huts built on them.

tag explanation
place=islet If still visible above water
historic=archaeological_site Use for genuine pre-historic sites as well as reconstructions, because they fall under experimental archaeology
site_type=settlement specify the historic site as a settlement
settlement_type=crannog sub-classify as crannog

Additional Tags

tag explanation
historic:civilization=prehistoric if genuinely that old, for modern reconstructions, use historic:civilization=modern
heritage=* If certified as heritage. Use additional references according the the country applicable, where available.
access=* These might be vulnerable sites, so please indicate if they are accessible to the public or not.



Like a historic site or tourist attraction, depending on what is the case.

Features/Pages affected


Further information


External discussions


Please comment on the discussion page.


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you are opposing based only on formal reasoning, without any useful comment about the proposal? —-Dieterdreist (talk) 07:15, 12 October 2022 (UTC)
  • I oppose this proposal I oppose this proposal. _type is a meaningless sufix, if we have to approve a key, we might as well approve settlement=* Marc marc (talk) 10:22, 7 October 2022 (UTC)
Until recently, settlement=* was used in combination with the values yes and no (I think), so it was not available. It is now, so that might be an option indeed.B-unicycling (talk) 13:57, 11 October 2022 (UTC)
  • I abstain from voting but have comments I have comments but abstain from voting on this proposal. I think it is best to deal with the previous two no-vote comments first, then restart the voting. --Peter Elderson (talk) 12:34, 7 October 2022 (UTC)
  • I approve this proposal I approve this proposal. --DIrish (talk) 18:47, 7 October 2022 (UTC)
  • I abstain from voting but have comments I have comments but abstain from voting on this proposal. Why not historic=crannog, already a vast number of values for historic=*? This could avoid all the other tags? As for requiring the historic=* to be approved... over 1,500,000 of these on the data base, so no need for approval. If you want to change it Martin, put forward a proposal? Warin61 (talk) 04:14, 8 October 2022 (UTC)
Indeed I find the problem fundamental in historic=archaeological_site. If it's an "artificial island" or actually above-water structure, it might be more than archaeology. It's not totally clear how to use it when the archaelogy and physical remnant are mixed. Worse, there are site_type=city and site_type=fortification, the former further conflicting with the format of site_type=settlement + settlement_type=town. Tag:site_type=settlement doesn't mention settlement_type=* at all, while suggesting site_type=village is a synonym. --- Kovposch (talk) 10:00, 8 October 2022 (UTC)
Archaeologists don't limit themself to dig under ground. They look at completely standing buildings, sites where part of the structure remain above ground or above water level.B-unicycling (talk) 18:03, 9 October 2022 (UTC)
Should they be historic=archaeological_site though? --- Kovposch (talk) 20:00, 9 October 2022 (UTC)
There have been Time Team episodes about them; I think that qualifies them as archaeological sites. B-unicycling (talk) 12:24, 11 October 2022 (UTC)
Now I haven't watched that show, but for the sake of comparison: I see they made an episode "The Lost Submarine of WWI": Still historic=wreck, not historic=archaeological_site? "The Lost WWI Bunker" is historic=bunker? They are something physical of their own, not in a pit below ground. --- Kovposch (talk) 20:00, 16 October 2022 (UTC)
  • I oppose this proposal I oppose this proposal. Mainly, approving settlement_type=* is undesirable as mentioned. settlement=* would still to be checked for any conflicts between common types. Additionally, tourism=attraction shouldn't mean "Some have been re-created in modern times". That could be used for untouched archaeological sites that's a visitor spot at the same time. The properness of building:condition=* (forgot if there is another alternative along the lines of moved=*, maintained=*, anthropogenic=*, etc for the status) or similar for replicates other than buildings can be debated. --- Kovposch (talk) 09:43, 8 October 2022 (UTC)
The re-constructions are usually (I believe) experimental archaeology; I think that counts as archaeological site, because archaeologists (and the general public) learn something from them. B-unicycling (talk) 12:26, 11 October 2022 (UTC)
  • I oppose this proposal I oppose this proposal. The tagging hierarchy needs some work and should be fixed before specific values of sub-keys are approved (and thereby approving the hierarchy by default). Casey boy (talk) 09:11, 10 October 2022 (UTC)
  • I approve this proposal I approve this proposal. --EneaSuper (talk) 11:34, 16 October 2022 (UTC)
  • I approve this proposal I approve this proposal. --Reino Baptista (talk) 10:29, 17 October 2022 (UTC)
  • I oppose this proposal I oppose this proposal. I'm not a big fan of "type" tags. Since they are rather ambiguous and I feel like the whole upper level tagging scheme thing needs to be sorted out before approving random subkeys. Otherwise your kind of putting the cart before the horse. Adamant1 (talk) 08:48, 20 October 2022 (UTC)
  • I approve this proposal I approve this proposal. I'm sympathetic to the unease about the historic hierarchy and *_type keys, but it's already widely used and documented. We can propose a "historic v2" scheme overhaul, but it shouldn't block this Crannóg refinement proposal. --Vincent De Phily (talk) 16:46, 20 October 2022 (UTC)
Voting closed

Voting on this proposal has been closed.

It was rejected with 6 votes for, 5 votes against and 2 abstentions.