Gregory Todd Williams

Libby’s doing some interesting stuff with SPARQL Cross-Searching using Joseki and client-side Javascript.

Spurred on by this, I’ve put up v1.014 of RDF::Query on the code page (still no project page — sorry!), which will run this query:

PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX dcterms: <http://purl.org/dc/terms/>
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>
PREFIX mygeo: <http://kasei.us/e/ns/geo#>
SELECT ?image ?point ?name ?lat ?long
WHERE {
?image rdf:type foaf:Image .
?image dcterms:spatial ?point .
?point geo:lat ?lat .
?point geo:long ?long .
?point foaf:name ?name .
FILTER mygeo:distance("mile", ?point, 41.8, -71.3) < 10 .
}
LIMIT 10

You still can’t order the points by the distance in a very quick way, but this will allow you to get all of the points within a certain radius, or get a fixed number of points within the radius (as shown) if you just want a sampling of points.