メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.1625000 35.0250000, 135.1687500 35.0250000, 135.1687500 35.0291667, 135.1625000 35.0291667, 135.1625000 35.0250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral