メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.6687500 32.6666667, 130.6750000 32.6666667, 130.6750000 32.6708334, 130.6687500 32.6708334, 130.6687500 32.6666667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral