メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.0625000 35.0875000, 134.0687500 35.0875000, 134.0687500 35.0916667, 134.0625000 35.0916667, 134.0625000 35.0875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral