メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.8937500 33.8500000, 130.9000000 33.8500000, 130.9000000 33.8541667, 130.8937500 33.8541667, 130.8937500 33.8500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral