メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.9937500 32.8541667, 130.0000000 32.8541667, 130.0000000 32.8583333, 129.9937500 32.8583333, 129.9937500 32.8541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral