Map: British Empire across the centuries

SELECT ?from ?to ?w WHERE {
  ?x rdfs:label "British Empire"@en ;
     geo:hasGeometry/geo:asWKT ?w ;
     ex:startYear ?from ; ex:endYear ?to .
}

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Run this query in the playground → 315 mapped feature(s) · 13.7 s · 5.5 MB of 168.3 MB read over HTTP range · no server, no download — the query runs in your browser.

The query

PREFIX ex: <http://ex/> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX geo: <http://www.opengis.net/ont/geosparql#> SELECT ?from ?to ?w WHERE { ?x rdfs:label "British Empire"@en ; geo:hasGeometry/geo:asWKT ?w ; ex:startYear ?from ; ex:endYear ?to . }

rete playground · documentation · github.com/caviri/rete