Map number of items at one place

#Map of all the paintings for which we know a location with the count per location
#defaultView:Map
SELECT ?locationLabel ?coord (count(*) as ?count)
WHERE {
    ?painting wdt:P31 wd:Q3305213 .
    ?painting wdt:P276 ?location .
?location wdt:P625 ?coord
SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }      
}
    GROUP BY ?locationLabel ?coord