メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.339830517802 43.0865834445906, 141.339948001781 43.0866003443929, 141.339974640205 43.0866040997139, 141.340725815997 43.0867099896006, 141.340551049564 43.0874515507084, 141.340367763937 43.0881135742303, 141.33961983035 43.0880196375091, 141.338888854076 43.0879276602801, 141.338944330374 43.0876854315984, 141.339044902055 43.087246294295, 141.339050528008 43.0872421882749, 141.33922971905 43.0865076258849, 141.339740296299 43.0865720361136, 141.339830517802 43.0865834445906)) ^^http://www.opengis.net/ont/geosparql#wktLiteral