メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.4937500 34.4625000, 135.5000000 34.4625000, 135.5000000 34.4666667, 135.4937500 34.4666667, 135.4937500 34.4625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral