メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.358875104899 43.1455190038255, 141.359032554089 43.1462118533334, 141.358464436533 43.1463044817098, 141.357586524849 43.1464129177351, 141.357564877909 43.1464154218812, 141.357490298076 43.1460683983227, 141.357412189172 43.145673523322, 141.357219057537 43.1448002870104, 141.357108356847 43.1442426980799, 141.357387135974 43.1441990139858, 141.358526901638 43.1439865589899, 141.358875104899 43.1455190038255)) ^^http://www.opengis.net/ont/geosparql#wktLiteral