メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.9687500 32.7375000, 132.9750000 32.7375000, 132.9750000 32.7416667, 132.9687500 32.7416667, 132.9687500 32.7375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral