メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.0250000 32.8750000, 130.0312500 32.8750000, 130.0312500 32.8791667, 130.0250000 32.8791667, 130.0250000 32.8750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral