thi.ng/fabric heatmap & ONS lat/lon polygon query

heatmap-query.edn

;; query spec to compute aggregated heatmap data of all property sales per borough
{:prefixes  {"sg" "http://statistics.data.gov.uk/def/statistical-geography#"}
 :q         [{:where [[?s "rdf:type" "schema:SellAction"]
                      [?s "schema:price" ?price]
                      [?s "ws:onsID" ?boroughID]
                      [?borough "rdfs:label" ?boroughID]
                      [?borough "sg:officialName" ?name]
                      [?borough "sg:hasExteriorLatLongPolygon" ?poly]]}]
 :aggregate {?num   (agg-count ?s)
             ?avg   (agg-avg ?price)
             ?min   (agg-min ?price)
             ?max   (agg-max ?price)
             ?apoly (agg-collect ?poly)
             ?aname (agg-collect ?name)}
 :group-by  ?boroughID
 :select    [?boroughID ?apoly ?avg ?min ?max ?num ?aname]}