メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.349599175097 43.1065165782637, 141.34948665992 43.106917620738, 141.348881586593 43.1068457844416, 141.348247186992 43.1067578907088, 141.347583046727 43.1066756666053, 141.347673310677 43.1062676258755, 141.347779611672 43.1058720197914, 141.349692414639 43.1061208698082, 141.349599175097 43.1065165782637)) ^^http://www.opengis.net/ont/geosparql#wktLiteral