メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.4937500 33.1416667, 130.5000000 33.1416667, 130.5000000 33.1458334, 130.4937500 33.1458334, 130.4937500 33.1416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral