[OSM-talk] Adding wikidata tags to the remaining objects with only wikipedia tag
osm at imagico.de
Wed Sep 20 15:56:55 UTC 2017
On Wednesday 20 September 2017, Frederik Ramm wrote:
> Does that mean that the original plan of "fetching" (dare I say
> importing) 200k Wikidata links through automated connections from
> existing Wikipedia links is (a) dangerous because you can easily
> obtain a reference to something totally different, or (b) no problem
> because it is *to be expected* that an object's Wikipedia and
> Wikidata links point to different things an hence the import wouldn't
> introduce "errors" per se?
It all depends on how you use the data. I think adding the wikidata
tags is fine *because* i regard them as simple references to related
features but if you'd insist on the idea that the OSM feature and the
wikidata item refer to the same real world feature then inferring such
an identity from an existing wikipedia tag is even more problematic -
because the wikipedia tag was almost certainly not originally verified
to refer to exactly the same concept as the OSM object.
Also keep in mind that both the OSM features and the wikidata items
evolve over time and not every edit made in OSM (like extending the
area of a forest polygon to include some additional tree covered area)
is necessarily verified to still justify having the wikidata reference.
What will inevitably happen if you automatically add wikidata tags is
that existing errors in either OSM (in form of incorrect wikipedia
tags) or in wikidata (in form of incorrect connections to wikipedia
articles) will get duplicated.
More information about the talk