Mr. Sgvizler

gTreeMap: The population of the world, sized in boxes per area category

The element which draws the above chart:

<div id="sgvzl_example_query" 
   data-sgvizler-endpoint="http://sws.ifi.uio.no/sparql/world" 
   data-sgvizler-query="SELECT ?a ?b xsd:int(?c) WHERE{ { ?a w:isCountryInRegion ?b ; w:hasCountryPopulation ?c } UNION { ?a w:isRegionInContinent ?b ; LET(?c := 0) } UNION { ?a a w:Continent; LET(?b := &quot;World&quot;) LET(?c := 0) } UNION { LET(?a := &quot;World&quot;) LET(?b := &quot;&quot;) LET(?c := 0) } }" 
   data-sgvizler-chart="gTreeMap" 
   data-sgvizler-loglevel="2" 
   style="width:800px; height:400px;"/>

The results of the query in gTable