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Today's Topics:

   1. Wikidata SPRQL (Jorge A. Hernandez) (Jorge Hernandez)
   2. Re: Wikidata SPRQL (Jorge A. Hernandez) (Magnus Manske)
   3. Re: Wikidata SPRQL (Jorge A. Hernandez) (Stas Malyshev)


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Message: 1
Date: Fri, 19 Feb 2016 11:43:52 -0800
From: Jorge Hernandez <jorgeah2@uci.edu>
To: wikidata-tech@lists.wikimedia.org
Subject: [Wikidata-tech] Wikidata SPRQL (Jorge A. Hernandez)
Message-ID:
        <CAKRCeoqcti2aGOrUfxdEy7qbO1XzXEWc+xaJHcbcia7PpSVn3Q@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Greeting Wiki Tinkers!

​I have been researching into Wikidata SPRQL, and am very much enjoying
the Wikidata Query Service API <https://query.wikidata.org/>, tool. ​After
some related research, I have managed to extract many related geo attributes
of request records like ( e.g., cities in cali, parking in U.S. etc.)
alongside pertinent fields
like wikipedia site, GNSID, etc.

Although, one problem that I am having occurs when I  requesting "bounding
boxes"
(i.e., northeast, southwest) point coordinates per record feature.
In fact, I am able to get the pertinent point coordinates (lat and long),
but how do we get the bounding boxes?

Is there a web location site where related queries are up for share?
Is there a Wikidata SPRQL prominent themed archive somewhere?

Thanks All!

Kindest Regards,
J.A. H.
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Message: 2
Date: Fri, 19 Feb 2016 23:49:51 +0000
From: Magnus Manske <magnusmanske@googlemail.com>
To: Wikidata technical discussion <wikidata-tech@lists.wikimedia.org>
Subject: Re: [Wikidata-tech] Wikidata SPRQL (Jorge A. Hernandez)
Message-ID:
        <CAGHUEtaEsYF3RB8PwHV2GUQu1c=dLDsLuNDRMyT9hpm3EuECHQ@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Better geo support will be added with the next blazegraph update, AFAIK.

On Fri, Feb 19, 2016 at 7:44 PM Jorge Hernandez <jorgeah2@uci.edu> wrote:

> Greeting Wiki Tinkers!
>
> ​I have been researching into Wikidata SPRQL, and am very much enjoying
> the Wikidata Query Service API <https://query.wikidata.org/>, tool.
> ​After some related research, I have managed to extract many related geo
> attributes
> of request records like ( e.g., cities in cali, parking in U.S. etc.)
> alongside pertinent fields
> like wikipedia site, GNSID, etc.
>
> Although, one problem that I am having occurs when I  requesting "bounding
> boxes"
> (i.e., northeast, southwest) point coordinates per record feature.
> In fact, I am able to get the pertinent point coordinates (lat and long),
> but how do we get the bounding boxes?
>
> Is there a web location site where related queries are up for share?
> Is there a Wikidata SPRQL prominent themed archive somewhere?
>
> Thanks All!
>
> Kindest Regards,
> J.A. H.
>
>
>
> _______________________________________________
> Wikidata-tech mailing list
> Wikidata-tech@lists.wikimedia.org
> https://lists.wikimedia.org/mailman/listinfo/wikidata-tech
>
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Message: 3
Date: Fri, 19 Feb 2016 16:26:32 -0800
From: Stas Malyshev <smalyshev@wikimedia.org>
To: Wikidata technical discussion <wikidata-tech@lists.wikimedia.org>
Subject: Re: [Wikidata-tech] Wikidata SPRQL (Jorge A. Hernandez)
Message-ID: <56C7B2B8.5020202@wikimedia.org>
Content-Type: text/plain; charset=utf-8

Hi!

> Although, one problem that I am having occurs when I  requesting
> "bounding boxes"
> (i.e., northeast, southwest) point coordinates per record feature.
> In fact, I am able to get the pertinent point coordinates (lat and
> long), but how do we get the bounding boxes?

Well, we kind of have something in a sense that globe coordinate has
precision:

https://www.mediawiki.org/wiki/Wikibase/Indexing/RDF_Dump_Format#Globe_coordinate

which creates a circle around the point. But not boxes. Geo features in
general are very much work in progress still.

>
> Is there a web location site where related queries are up for share?
> Is there a Wikidata SPRQL prominent themed archive somewhere?

There are two places with query examples:

1. "Official" collection which is hooked directly to GUI in
query.wikidata.org:
https://www.mediawiki.org/wiki/Wikibase/Indexing/SPARQL_Query_Examples

2. https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/queries -
page where a lot of community members add SPARQL experiments and discuss
them. Check also the talk page.

You may be interested in this part:
https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/queries#Working_with_co-ordinates

--
Stas Malyshev
smalyshev@wikimedia.org



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End of Wikidata-tech Digest, Vol 34, Issue 7
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