[OSM-talk] Tool for users to add wikidata tags

Yves yvecai at gmail.com
Sun Jun 11 18:47:40 UTC 2017


Reading the discussion, I can't help but feel greatful for Edward's effort to ensure good quality. Have a read again on his first post: a lot have already been thought already. Don't give the impression you blame the tool! 
Just a feeling, I'm not fond of external IDs in OSM myself. 
Yves 


Le 7 juin 2017 23:08:28 GMT+02:00, Edward Betts <edward at 4angle.com> a écrit :
>I've built a tool for mappers to match things in OSM with Wikidata and
>add the
>appropriate wikidata tag to OSM.
>
>https://osm.wikidata.link/
>
>Users can search for a administrative area or city, then pick an area
>to
>analyse. It works best if mappers pick areas they're familiar with.
>
>The matcher can take a few minutes to run. It grabs items from Wikidata
>and
>figures out a target set of tags and keys to search for. Then it
>downloads OSM
>data and looks for matches. The matching is based on tags and names,
>currently
>the wikipedia tags aren't considered.
>
>The OSM data is retrieved from the Overpass API, large (more than 1,000
>sq km)
>or dense areas might fail with a timeout error.
>
>The results are cached in the system and are available here:
>
>https://osm.wikidata.link/places
>
>Once the matching process is complete the mapper is given a tabbed page
>with
>the results. The five tabs are:
>
>  Match candidates - things on OSM that might be considered for tagging
>  Already tagged - matches that are already tagged in OSM
>  No match - items from Wikidata with no match found in OSM 
>  Wikidata query - the query used to find Wikidata items
>  Overpass query - the Overpass query to find OSM objects in this area
>
>To start tagging the mapper is able to login to OSM via OAuth. Tick
>boxes will
>appear next to the likely matches, the mapper can tick the box next to
>the
>matches they want to upload, then add a change comment and upload them
>using
>their own OSM account. Uploads within an area are combined into a
>single
>changeset.
>
>If the mapper sees an obviously incorrect match they can use the
>'report bad
>match' option to warn other mappers and provide feedback that I can use
>to
>improve the algorithm.
>
>This tools doesn't add any new objects to OSM. The only change it makes
>is
>adding a wikidata tag to existing things.
>
>My approach is to aim for a one-to-one mapping between Wikidata and
>OSM. If
>there are two or more things in OSM that look like a Wikidata item then
>it
>isn't a good match. This means for example that most road and rail
>bridges
>won't be tagged because they are represented as two OSM ways. I might
>change
>this at some point.
>
>There are occasional duplicates in Wikidata, this tool should spot them
>and
>refuse to add wikidata tags until the Wikidata duplicate is resolved.
>
>The bug/todo list is here:
>https://github.com/EdwardBetts/osm-wikidata/issues
>
>Any ideas or suggestions are welcome.
>-- 
>Edward.
>
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