メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.92540715428 37.8295327151813, 140.918969312733 37.8293304264508, 140.918630702524 37.8293818287797, 140.918784780674 37.8280869093441, 140.925402519626 37.8283154219426, 140.925402732795 37.8287753518358, 140.92540715428 37.8295327151813)) ^^http://www.opengis.net/ont/geosparql#wktLiteral