query: # Map of Dutch fortifications inspired by Map of Czech castles
  #defaultView:Map
  SELECT ?item ?itemLabel ?coord ?img ?layerLabel
  WHERE
  {
  	?item wdt:P31/wdt:P279* wd:Q57821 .
  	?item wdt:P17 wd:Q55 .
  	?item wdt:P625 ?coord .
  	OPTIONAL { ?item wdt:P18 ?img } .
  	OPTIONAL { ?item wdt:P31 ?layer } .
  	SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en" } .
  
  }