Re: [Virtuoso-users] GeoSPARQL functions Support

[Ghislain ATEMEZING]

Hi Pasquale,
Try the examples in this link http://linkedgeodata.org/OSM. You'll find
results.

HTH
Ghislain

El jue., 28 jul. 2016 a las 12:55, Pasquale Di Donato (<
pasquale.didon...@gmail.com>) escribió:

> Hi Ghislain,
> many thanks for your answer.
> By the way the page you're mentioning doesn't resolv my doubts.
>
> First the last two examples, which are using geospatial query
> (bif:st_intersects) are not working: the first is giving no results, the
> last an error.
>
> Then I'm concerned with the geospatial functions. E.g. bif:st_intersect is
> defined in an openlink ontology (http://www.openlinksw.com/schemas/bif#)
> and are based as far as I can see on SQL MM.
> The GeoSPARQL functions are defined here:
> http://www.opengis.net/def/function/geosparql/. The GeoSPARQL function
> for intersect is
> http://www.opengis.net/def/function/geosparql/sfIntersects
>
> I don't understand if these GeoSPARQL functions are supported by Virtuoso.
>
>
> Pasquale
>
>
>
>
>
>
>
>
>
>
>
>
> On Thu, Jul 28, 2016 at 11:02 AM, Ghislain ATEMEZING <
> ghislain.atemez...@gmail.com> wrote:
>
>> Hi Pasquale,
>> Yes, I think you are missing something. The point is probably that you
>> are not using quite well the functions in your queries?!
>> Please have a look at this page
>> http://linkedgeodata.org/GADM which contains some sample queries for the
>> LinkedGeo data endpoint which powered by Virtuoso.
>>
>> HTH
>> Ghislain
>>
>> Sent from my iPhone, may include typos
>>
>> Le 28 juil. 2016 à 08:34, Pasquale Di Donato 
>> a écrit :
>>
>> Dear list,
>>
>> yesterday I asked via a tweet @OpenLink is Virtuoso supports the
>> GeoSPARQL functions here defined:
>> http://www.opengis.net/def/function/geosparql/.
>>
>> Answer has been: "Virtuoso  supports much GeoSPARQL" today and I've been
>> redirected to the following page:
>> http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtGeoSPARQLEnhancementDocs
>>
>> In that page I see that geospatial queries are done via bif:something,
>> where all these bif:* are built-in SQL MM based functions.
>> Now if I do test with some GeoSPARQL functions, e.g. sfWithin, I get
>> error messages: meaninf IMHO that GeoSPARQL functions are not supported.
>>
>> Or am I missing simething?
>>
>> Ciao
>> Pasquale
>>
>>
>> --
>>
>> ___
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>> Virtuoso-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/virtuoso-users
>>
>>
> --
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Re: [Virtuoso-users] GeoSPARQL functions Support

[Pasquale Di Donato]

Hi Ghislain,
many thanks for your answer.
By the way the page you're mentioning doesn't resolv my doubts.

First the last two examples, which are using geospatial query
(bif:st_intersects) are not working: the first is giving no results, the
last an error.

Then I'm concerned with the geospatial functions. E.g. bif:st_intersect is
defined in an openlink ontology (http://www.openlinksw.com/schemas/bif#)
and are based as far as I can see on SQL MM.
The GeoSPARQL functions are defined here:
http://www.opengis.net/def/function/geosparql/. The GeoSPARQL function for
intersect is http://www.opengis.net/def/function/geosparql/sfIntersects

I don't understand if these GeoSPARQL functions are supported by Virtuoso.


Pasquale












On Thu, Jul 28, 2016 at 11:02 AM, Ghislain ATEMEZING <
ghislain.atemez...@gmail.com> wrote:

> Hi Pasquale,
> Yes, I think you are missing something. The point is probably that you are
> not using quite well the functions in your queries?!
> Please have a look at this page
> http://linkedgeodata.org/GADM which contains some sample queries for the
> LinkedGeo data endpoint which powered by Virtuoso.
>
> HTH
> Ghislain
>
> Sent from my iPhone, may include typos
>
> Le 28 juil. 2016 à 08:34, Pasquale Di Donato 
> a écrit :
>
> Dear list,
>
> yesterday I asked via a tweet @OpenLink is Virtuoso supports the GeoSPARQL
> functions here defined: http://www.opengis.net/def/function/geosparql/.
>
> Answer has been: "Virtuoso  supports much GeoSPARQL" today and I've been
> redirected to the following page:
> http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtGeoSPARQLEnhancementDocs
>
> In that page I see that geospatial queries are done via bif:something,
> where all these bif:* are built-in SQL MM based functions.
> Now if I do test with some GeoSPARQL functions, e.g. sfWithin, I get error
> messages: meaninf IMHO that GeoSPARQL functions are not supported.
>
> Or am I missing simething?
>
> Ciao
> Pasquale
>
>
> --
>
> ___
> Virtuoso-users mailing list
> Virtuoso-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/virtuoso-users
>
>
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Re: [Virtuoso-users] GeoSPARQL functions Support

[Ghislain ATEMEZING]

Hi Pasquale,
Yes, I think you are missing something. The point is probably that you are not 
using quite well the functions in your queries?! 
Please have a look at this page 
http://linkedgeodata.org/GADM which contains some sample queries for the 
LinkedGeo data endpoint which powered by Virtuoso.

HTH
Ghislain 

Sent from my iPhone, may include typos

> Le 28 juil. 2016 à 08:34, Pasquale Di Donato  a 
> écrit :
> 
> Dear list,
> 
> yesterday I asked via a tweet @OpenLink is Virtuoso supports the GeoSPARQL 
> functions here defined: http://www.opengis.net/def/function/geosparql/.
> 
> Answer has been: "Virtuoso  supports much GeoSPARQL" today and I've been 
> redirected to the following page: 
> http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtGeoSPARQLEnhancementDocs
> 
> In that page I see that geospatial queries are done via bif:something, where 
> all these bif:* are built-in SQL MM based functions.
> Now if I do test with some GeoSPARQL functions, e.g. sfWithin, I get error 
> messages: meaninf IMHO that GeoSPARQL functions are not supported.
> 
> Or am I missing simething?
> 
> Ciao
> Pasquale
> --
> ___
> Virtuoso-users mailing list
> Virtuoso-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/virtuoso-users
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[Virtuoso-users] GeoSPARQL functions Support

[Pasquale Di Donato]

Dear list,

yesterday I asked via a tweet @OpenLink is Virtuoso supports the GeoSPARQL
functions here defined: http://www.opengis.net/def/function/geosparql/.

Answer has been: "Virtuoso  supports much GeoSPARQL" today and I've been
redirected to the following page:
http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtGeoSPARQLEnhancementDocs

In that page I see that geospatial queries are done via bif:something,
where all these bif:* are built-in SQL MM based functions.
Now if I do test with some GeoSPARQL functions, e.g. sfWithin, I get error
messages: meaninf IMHO that GeoSPARQL functions are not supported.

Or am I missing simething?

Ciao
Pasquale
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