On 12/28/10 10:52 AM, Nguyen Mau Quoc Hoan wrote:
I've read the RDF Geography Virtuoso document and tried some examples
in this.
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>
SELECT ?class
COUNT (*)
WHERE { ?m geo:geometry ?geo .
?m a ?class .
FILTER ( <bif:st_intersects>
( ?geo,<bif:st_point> (0, 52),100)
)
}
GROUP BY ?class
ORDER BY DESC 2
and I got this error message :
42001 Error SR185: Undefined procedure SPARQL.SPARQL.st_point.
What's problem with this?I think this function is already defined in
virtuoso.
You can use SPARQL-GEO with the Open Source edition of Virtuoso, you
need the commercial edition for this functionality.
Kingsley
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Kingsley Idehen
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