メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.1312500 33.8500000, 133.1375000 33.8500000, 133.1375000 33.8541667, 133.1312500 33.8541667, 133.1312500 33.8500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral