メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.9937500 34.4458334, 136.0000000 34.4458334, 136.0000000 34.4500000, 135.9937500 34.4500000, 135.9937500 34.4458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral