メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.3250000 35.1875000, 133.3312500 35.1875000, 133.3312500 35.1916667, 133.3250000 35.1916667, 133.3250000 35.1875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral