メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.375154373722 43.0770474463095, 141.375913155883 43.0771564830421, 141.375563085111 43.0776406294091, 141.375209083977 43.0781032924806, 141.374606735175 43.0777886798337, 141.373986032395 43.0774832768565, 141.374361174762 43.0769368747312, 141.375154373722 43.0770474463095)) ^^http://www.opengis.net/ont/geosparql#wktLiteral