Yes, this sounds like a sensible approach to me.
Am 19. März 2020 16:36:07 MEZ schrieb Zsolt Ero <zsolt....@gmail.com>: >Thanks! I was able to get these queries running, making them in a >batch of 100, putting a 5 seconds sleep between them. > >Now I've downloaded population data and mixed them so I think I've >solved this. > >Just to clarify: >1. I need to run both the "simple" and the "latest" query and mix the >results. >2. I see that for 95% the cases the "latest" query works and returns >the latest data. >3. 5% of the cases, only the "simple" query works, for example: >https://www.wikidata.org/wiki/Q128323 > >Is that correct like this? > >Zsolt > >On Thu, 19 Mar 2020 at 11:10, Benno Fünfstück ><benno.fuenfstu...@mailbox.tu-dresden.de> wrote: >> >> You can just insert all those items into the `VALUES` statement at >the >> top of the query. >> >> Here is a query to only selects data where the "point in time" >qualifier >> is present, and then only gives you the latest version: >https://w.wiki/KkM >> >> Note that this query won't return any results for items where "point >in >> time" is not specified on any statement. It's unclear to me how that >> case should be dealt with, from a semantic point of view: what can we >do >> if we don't know from which time the data is? >> >> Regards, >> Benno >> >> On 18.03.20 23:40, Zsolt Ero wrote: >> > Thanks! There is about 5000 item ids in the Natural Earth dataset, >> > what would be the best way to get them? Also, how can I get the >latest >> > data? For example in your query Italy shows 2016, and there is 2017 >> > and 2020 in there. >> > >> > On Wed, 18 Mar 2020 at 23:34, Lucas Werkmeister >> > <m...@lucaswerkmeister.de> wrote: >> >> If you have the item IDs already, the query is relatively simple: >> >> >> >> SELECT ?item ?population WHERE { >> >> VALUES ?item { wd:Q38 wd:Q148 wd:Q884 } >> >> ?item wdt:P1082 ?population. >> >> } >> >> >> >> https://w.wiki/KjA >> >> >> >> You can add more values for the ?item (and spread them across >several >> >> lines as well), the three above are just an example. >> >> >> >> Cheers, >> >> Lucas >> >> >> >> On 18.03.20 22:58, Zsolt Ero wrote: >> >>> Hi, >> >>> >> >>> I'm contributing to develop an open source scraper for COVID-19 >data >> >>> and we are looking to download the population data from Wikidata >for >> >>> regions around the world. >> >>> >> >>> First, we'd like to get province / state / county items but later >on >> >>> probably much finer granularity. We have Wikidata Q id-s from >Natural >> >>> Earth, we just don't know how to get the population data from >Wikidata >> >>> without scraping. I've seen that there is either a 71 GB gzip >JSON >> >>> archive or the query service on https://query.wikidata.org/. >> >>> >> >>> What I'm looking for would be very simple, just {"Q1234567": >> >>> population} pairs in a JSON, I guess the query service would be >ideal, >> >>> but I have no idea how to use it (even after looking at the >tutorial). >> >>> >> >>> Can you help me write this very simple query? >> >>> >> >>> Zsolt >> >>> >> >>> _______________________________________________ >> >>> Wikidata mailing list >> >>> Wikidata@lists.wikimedia.org >> >>> https://lists.wikimedia.org/mailman/listinfo/wikidata >> >>> >> >> _______________________________________________ >> >> Wikidata mailing list >> >> Wikidata@lists.wikimedia.org >> >> https://lists.wikimedia.org/mailman/listinfo/wikidata >> > _______________________________________________ >> > Wikidata mailing list >> > Wikidata@lists.wikimedia.org >> > https://lists.wikimedia.org/mailman/listinfo/wikidata
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