メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348247186992 43.1067578907088, 141.348881586593 43.1068457844416, 141.34948665992 43.106917620738, 141.349283041942 43.1077647444707, 141.348669899904 43.1076928447512, 141.348457381825 43.1076674776546, 141.348048689936 43.1076149016663, 141.34739003158 43.1075249149004, 141.347476057163 43.107170290218, 141.347583046727 43.1066756666053, 141.348247186992 43.1067578907088)) ^^http://www.opengis.net/ont/geosparql#wktLiteral