Andrew Guertin <andrew.guer...@uvm.edu> wrote: > On 08/27/2014 12:47 PM, Edward Betts wrote: > >I'd like to annotate these 70k objects in OSM with a Wikidata tag > >automatically. > > I like the sound of this. Personally, I think it adds value, and having > looked at the code your matching criteria sound good.
Thanks! > There are a couple of things it would make me happy to see before you go > through with this: > > > 1: Elsewhere in this thread it was mentioned that there are 22000 wikidata > ids in OSM currently. Are there any objects which currently have a wikidata > id that your code would assign a different id to? Similarly, are there any > instances where your code would assign a wikidata id to something and a > different object in OSM already has that wikidata id? I haven't checked for either of these conditions. These are both good points and I'll investigate. > 2: You mention elsewhere in this thread that the maximum distance difference > between the wikidata location and the osm object is 400 meters. How was this > number arrived at? Could you make a list of matches including and sorted by > the distance difference for people to look at? I think it's worth it for > interested people to be able to independently verify at what distance the > accuracy declines and what a good cutoff is. I don't have any basis for picking 400 meters, I just needed a number and that one seemed reasonable. > It might be good to also include in that list what type of feature something > is. If you're comparing using centroids, more leniency might be in order > for, e.g., a large lake than a small building. This is also a good point. I tried using the overpass 'is_in' command, but I don't understand overpass areas. -- Edward. _______________________________________________ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
