メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.3000000 32.7000000, 130.3062500 32.7000000, 130.3062500 32.7041667, 130.3000000 32.7041667, 130.3000000 32.7000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral