Hi deng,
we have to be precise here and your latter example is not valid XML
can you send an example in turtle or a complete RDF/XML one?
On Tue, Jul 2, 2013 at 12:47 PM, deng dongpo <[email protected]> wrote:
> Yes, it should be workable. But please allow me to make complement. The
> more official way to encode a point via OGC GeoSPARQL spec should be add a
> CRS description, as following example. The URI indicates WGS84.
>
> <geo:Point>
> <geo:asWKT rdf:datatype="http://www.opengis.net/ont/sf#wktLiteral";>
> <http://www.opengis.net/def/crs/OGC/1.3/CRS84> (141.70853
> 39.0819011)
> </geo:asWKT>
> </geo:Point>
>
>
> On Tue, Jul 2, 2013 at 5:26 PM, Dimitris Kontokostas <[email protected]>wrote:
>
>> It is easy to add this spec too in the following dbpedia release
>>
>> From my understanding, for every coordinate we should just add the
>> following triple to be geoSPARQL compatible?
>> <http://www.opengis.net/ont/geosparql#Point> <
>> http://www.opengis.net/ont/geosparql#asWKT> "Point({lat} {lon})"^^<
>> http://www.opengis.net/ont/sf#wktLiteral>
>>
>> Dimitris
>>
>>
>> On Tue, Jul 2, 2013 at 12:00 PM, deng dongpo <[email protected]>wrote:
>>
>>> Hi Smalis and Sebastian
>>>
>>> Maybe I can share some information and my experiences.
>>>
>>> The geo vocabularies (W3C) using in DBpedia are different from GeoSPARQL
>>> (OGC). Thus, even through DBpedia triples are imported to geospatial triple
>>> store such as BBN Parliament, the geo queries cannot be worked because
>>> triple stores cannot make spatial indexes. Take a simple example
>>> of coordinates.
>>>
>>> In DBpedia, it uses W3C, so it should be like:
>>>
>>> <geo:Point>
>>> <geo:lat>39.0819011</geo:lat>
>>> <geo:long>141.70853</geo:long>
>>> </geo:Point>
>>>
>>> But OGC GeoSPARQL recommends the way:
>>>
>>> <geo:Point>
>>> <geo:asWKT rdf:datatype="http://www.opengis.net/ont/sf#wktLiteral";>
>>> Point(141.70853 39.0819011)
>>> </geo:asWKT>
>>> </geo:Point>
>>>
>>> Here, the two prefixes "Geo" are different as well.
>>> W3C is geo="http://www.w3.org/2003/01/geo/wgs84_pos#";; and
>>> OGC is geo="http://www.opengis.net/ont/geosparql#";
>>>
>>> By the way, there us the other OGC GeoSPARQL triple store, called STRABON
>>> http://www.strabon.di.uoa.gr/
>>>
>>>
>>> Cheers,
>>> Dongpo
>>>
>>>
>>>
>>>
>>> On Tue, Jul 2, 2013 at 4:13 PM, Sebastian Hellmann <
>>> [email protected]> wrote:
>>>
>>>> Hi Smalis,
>>>> I guess, your question didn't get an answer, because many people (such
>>>> as myself) ar completely unfamiliar with the newly emerging GEOsparql.
>>>>
>>>> Your question might be more appropriate for the Virtuoso discussion
>>>> list. If Virtuoso implements it DBpedia will have it, I suppose.
>>>>
>>>> Sebastian
>>>>
>>>> Am 24.06.2013 15:37, schrieb Smalis Sklavos:
>>>>
>>>> Hi,
>>>> I would like to ask whether dbpedia is able or is planning to support
>>>> GEOsparql.
>>>> I believe, that it is a useful tool, and I would be glad to see it
>>>> happening.
>>>> Also, if I want to use dbpedia locally, using Geosparql on it, do you
>>>> know if I should use a triple store such as parliament ?
>>>> Thank you in advance
>>>>
>>>> Smalis Sklavos
>>>>
>>>>
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>>>>
>>>> --
>>>> Dipl. Inf. Sebastian Hellmann
>>>> Department of Computer Science, University of Leipzig
>>>> Events:
>>>> * NLP & DBpedia 2013 (http://nlp-dbpedia2013.blogs.aksw.org, Deadline:
>>>> *July 8th*)
>>>> * LSWT 23/24 Sept, 2013 in Leipzig (http://aksw.org/lswt)
>>>> Venha para a Alemanha como PhD:
>>>> http://bis.informatik.uni-leipzig.de/csf
>>>> Projects: http://nlp2rdf.org , http://linguistics.okfn.org ,
>>>> http://dbpedia.org/Wiktionary , http://dbpedia.org
>>>> Homepage: http://bis.informatik.uni-leipzig.de/SebastianHellmann
>>>> Research Group: http://aksw.org
>>>>
>>>>
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>>>
>>>
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>>
>>
>> --
>> Kontokostas Dimitris
>>
>
>
--
Kontokostas Dimitris
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