メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.9687500 33.7375000, 133.9750000 33.7375000, 133.9750000 33.7416667, 133.9687500 33.7416667, 133.9687500 33.7375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral