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 <pasquale.didon...@gmail.com> >> 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 >> >> > -- ------- "Love all, trust a few, do wrong to none" (W. Shakespeare) Web: http://atemezing.org
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