メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.330147201042 43.0496259940029, 141.330143851058 43.0496576151347, 141.330063841465 43.0503010507723, 141.32931364731 43.0502426193009, 141.32832918453 43.0501773733632, 141.328384887173 43.0497685742556, 141.328414300092 43.0495528301098, 141.328454376112 43.0492588943164, 141.328503608238 43.0488978669945, 141.330225912566 43.0490114537658, 141.330147201042 43.0496259940029)) ^^http://www.opengis.net/ont/geosparql#wktLiteral