メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.315258901763 43.1122194407895, 141.315912952253 43.1128788220913, 141.315553719532 43.1130756215455, 141.315203363845 43.1132693283255, 141.314857470708 43.1134597642301, 141.314794914621 43.1135269092035, 141.314101668157 43.11284469516, 141.313421239786 43.1121915558935, 141.313851124254 43.1119696004598, 141.314183913246 43.1117757553641, 141.314567747157 43.1115517334357, 141.315258901763 43.1122194407895)) ^^http://www.opengis.net/ont/geosparql#wktLiteral