メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.774033210128 34.6207862678303, 135.773294053131 34.6206858636961, 135.773291232614 34.6206264137148, 135.77328519926 34.6200857699711, 135.774103428129 34.6200626439802, 135.774033210128 34.6207862678303)) ^^http://www.opengis.net/ont/geosparql#wktLiteral