apps-android-commons/app/src/main/assets/queries/nearby_query.rq

SELECT
     (SAMPLE(?location) as ?location)
     ?item
     (SAMPLE(COALESCE(?item_label_preferred_language, ?item_label_any_language)) as ?label)
     (SAMPLE(?classId) as ?class)
     (SAMPLE(COALESCE(?class_label_preferred_language, ?class_label_any_language, "?")) as ?class_label)
     (SAMPLE(COALESCE(?icon0, ?icon1)) as ?icon)
     (SAMPLE(COALESCE(?emoji0, ?emoji1)) as ?emoji)
     ?wikipediaArticle
     ?commonsArticle
   WHERE {
     # Around given location...
     SERVICE wikibase:around {
       ?item wdt:P625 ?location.
       bd:serviceParam wikibase:center "Point(${LONG} ${LAT})"^^geo:wktLiteral.
       bd:serviceParam wikibase:radius "${RADIUS}" . # Radius in kilometers.
     }

     # ... and without an image.
     MINUS {?item wdt:P18 []}

     # Get the label in the preferred language of the user, or any other language if no label is available in that language.
     OPTIONAL {?item rdfs:label ?item_label_preferred_language. FILTER (lang(?item_label_preferred_language) = "${LANG}")}
     OPTIONAL {?item rdfs:label ?item_label_any_language}

     # Get the class label in the preferred language of the user, or any other language if no label is available in that language.
     OPTIONAL {
       ?item p:P31/ps:P31 ?classId.
       OPTIONAL {?classId rdfs:label ?class_label_preferred_language. FILTER (lang(?class_label_preferred_language) = "${LANG}")}
       OPTIONAL {?classId rdfs:label ?class_label_any_language}

       # Get icon
       OPTIONAL { ?classId wdt:P2910 ?icon0. }
       OPTIONAL { ?classId wdt:P279*/wdt:P2910 ?icon1. }
       # Get emoji
       OPTIONAL { ?classId wdt:P487 ?emoji0. }
       OPTIONAL { ?classId wdt:P279*/wdt:P487 ?emoji1. }
       OPTIONAL {
          ?sitelink schema:about ?item .
          ?sitelink schema:inLanguage "en"
       }
       OPTIONAL {
           ?wikipediaArticle   schema:about ?item ;
                               schema:isPartOf <https://en.wikipedia.org/> .
           SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
         }

         OPTIONAL {
           ?commonsArticle   schema:about ?item ;
                               schema:isPartOf <https://commons.wikimedia.org/> .
           SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
         }
     }
   }
   GROUP BY ?item ?wikipediaArticle ?commonsArticle