[Tagging] barrows and tumuli

[Anne-Karoline Distel]

The last couple of days, I've been looking at tumuli/ barrows on the
map, because it turns out, it's the same. I have added that information
to the wiki
(https://wiki.openstreetmap.org/wiki/Tag:archaeological_site%3Dtumulus).
In Ireland and the UK, I've also tried to tidy up the tags, so there are
now no archaeological_site=barrow/ ring-barrow/ round_barrow etc.

I've also drawn diagrams of the different types of tumuli and added a
table on the above mentioned tumulus wiki page which also shows possible
redundant tags.

However, long barrow is documented as archaeological_site=megalith +
megalith_type=long_barrow. They should all fall into the same hierarchy.
This is really my question - should long barrows not also be tagged as
archaeological_site=tumulus + tumulus=long_barrow?

Even when all tumuli are megaliths, but archaeological_site=megalith +
megalith_type=tumulus + tumulus=long_barrow is a bit of an overkill, IMHO.

Anne