メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.355510190736 43.7410567022906, 142.356218410756 43.7412680786361, 142.355557167455 43.7424093996154, 142.354891372102 43.7435772512169, 142.354534808245 43.7434716762874, 142.354179918242 43.7433740286645, 142.351966334286 43.7427649497354, 142.35320497497 43.7404044985021, 142.354850582209 43.7408598159374, 142.355510190736 43.7410567022906)) ^^http://www.opengis.net/ont/geosparql#wktLiteral