メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.698805769275 44.3639676472983, 141.69875064699 44.3640029947232, 141.698249267846 44.3643247181803, 141.697785009559 44.364622536223, 141.696771583076 44.3638349809804, 141.697243248011 44.363525882356, 141.697765086684 44.3631910769769, 141.697791368611 44.3631740138196, 141.698340928454 44.3636025719357, 141.698805769275 44.3639676472983)) ^^http://www.opengis.net/ont/geosparql#wktLiteral