メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.7625000 34.5833333, 135.7687500 34.5833333, 135.7687500 34.5875000, 135.7625000 34.5875000, 135.7625000 34.5833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral