メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.3937500 33.2500000, 130.4000000 33.2500000, 130.4000000 33.2541667, 130.3937500 33.2541667, 130.3937500 33.2500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral