メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.546717420824 43.1161320368467, 141.543996972362 43.1174333850046, 141.54367863413 43.1171029811202, 141.542767376902 43.1160987429077, 141.541738430711 43.114963377444, 141.544311748211 43.1136787572394, 141.54556085502 43.1130639032498, 141.546575892893 43.1141599055863, 141.546997679116 43.1146152805923, 141.547443508785 43.1150966827789, 141.547882764075 43.115574525485, 141.546717420824 43.1161320368467)) ^^http://www.opengis.net/ont/geosparql#wktLiteral