gistfile1.js

  jQuery(document).ready(function(){
    rdfstore.create(function(store) {

      var myLocLat = 0;
      var myLocLng = 0;
      var nearbyRadius = 0.5; // in km		

      // extracts data from remote SPARQL endpoint
      var queryStr2 = 'PREFIX lgdo:<http://linkedgeodata.org/ontology/>\
		       CONSTRUCT {\
			     ?s a lgdo:Amenity .\
			     ?s rdfs:label ?l .\
			     ?s geo:geometry ?g }\
		       FROM <http://linkedgeodata.org>\
		       WHERE {	?s a lgdo:Amenity .\
				?s rdfs:label ?l .\
				?s geo:geometry ?g .\
				FILTER(bif:st_intersects (?g, bif:st_point (' + myLocLng + ',' +  myLocLat + '), ' + nearbyRadius + ')) . }';

      var defaultGraph = 'http://linkedgeodata.org';	

      // we request data in N3 format
      var queryURLBase = 'http://live.linkedgeodata.org/sparql?default-graph-uri=' + encodeURIComponent(defaultGraph);
      var format='&format=text%2Frdf%2Bn3';
	
      // queries local endpoint
      var queryStr1 = 'PREFIX lgdo: <http://linkedgeodata.org/ontology/>\
		       PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#>\
		       PREFIX geo:<http://www.w3.org/2003/01/geo/wgs84_pos#>\
		       SELECT ?s ?l ?g	\
		       WHERE {\
			  ?s a lgdo:Amenity .\
			  ?s rdfs:label ?l . ?s geo:geometry ?g	 }';




      jQuery.get(queryURLBase + '&query=' + queryStr2 + format , function(data, textStatus){
	if(data) {
	  // we store the returned triples in the local default graph
	  store.load("text/n3",data,function(success) {
	    if(success) {
	      store.execute(queryStr1, function(success, results) {
		  // results have 5 bindings
		  alert("Found "+results.length);
	      });
	    }
	  });
	}
      });
    })

  });