メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.8000000 33.9291667, 130.8062500 33.9291667, 130.8062500 33.9333333, 130.8000000 33.9333333, 130.8000000 33.9291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral