メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.385164568452 38.314045568788, 140.385103565548 38.3137515390629, 140.386208591931 38.313594146795, 140.386202095307 38.3135608992694, 140.386505546005 38.3135282696185, 140.386581832746 38.313887816382, 140.385164568452 38.314045568788)) ^^http://www.opengis.net/ont/geosparql#wktLiteral