On 04/01/2017 12:19, Andy Mabbett wrote:
On 4 January 2017 at 10:11, Frederik Ramm <[email protected]> wrote:
Wikidata tags in OSM are already of low quality because of mindless
mass-addition by people with zero local knowledge
Oh, please stop with this FUD.
Unless you have evidence* to support this assertion, you should
apologise to the good people whose hard work has seen many thousands
of Wikidata tags usefully - and automatically - added to OSM.
* not anecdotes.
Do my comments on http://www.openstreetmap.org/changeset/43749373 count
as "evidence" or "anecdotes" in your book? I'm still waiting for the
issues raised there to be addressed.
FWIW (and this bit is anecdotal - I've not put any numbers together) the
root cause of the problems I'm seeing local to me seems to be a lack of
data quality at the wikidata end. Typically, a wikidata article is
created from a wikipedia article, and that wikipedia article covers more
than one OSM item.
For example, https://www.openstreetmap.org/relation/957808 is Dunham on
Trent civil parish, and https://www.openstreetmap.org/node/1782116865 is
the village itself. The civil parish object has a wikidata link to
https://www.wikidata.org/wiki/Q5315240 , but the village does not.
Unfortunately https://www.wikidata.org/wiki/Q5315240 claims to be a
village not a civil parish. It was created from
https://en.wikipedia.org/wiki/en:Dunham-on-Trent,%20Nottinghamshire
which claims to be _both_.
You could argue whether the problem occurred at the creation of the
wikidata item from the wikipedia item, or the linking of the "wrong" OSM
item to wikidata, but you can't argue that something hasn't gone a bit
wrong here.
I'd certainly suggest that currently anyone consuming wikidata links in
OSM data looks very carefully at who added them. For example, when I
create Garmin maps (mainly for walking) I try and indicate on them if a
contributor isn't likely to have actually walked the path in question -
if I need to get back to a location before it gets dark I might choose a
path added by someone who's definitely walked down it rather than
someone who may not have done - maybe wikidata consumers should do
something similar.
Best Regards,
Andy (SomeoneElse)
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