メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.991580516435 43.5517461094247, 144.991524934157 43.5517101397673, 144.991180138208 43.5514795422924, 144.992160630775 43.550664535393, 144.99295473128 43.5511745812317, 144.993036219206 43.5512274724049, 144.992402388643 43.5517475105643, 144.992302992464 43.5516834810871, 144.991939835764 43.5514531511888, 144.991580516435 43.5517461094247)) ^^http://www.opengis.net/ont/geosparql#wktLiteral