メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.336444571651 43.1078396875556, 141.336489923707 43.1079463860622, 141.336639367083 43.1082568134564, 141.33627960871 43.1084241267503, 141.335838689042 43.1086398078633, 141.335226591342 43.1079035666658, 141.33552808601 43.1077554807639, 141.336034152242 43.1075091670691, 141.336263313518 43.1074161299827, 141.336444571651 43.1078396875556)) ^^http://www.opengis.net/ont/geosparql#wktLiteral