メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.0125000 35.4041667, 136.0187500 35.4041667, 136.0187500 35.4083333, 136.0125000 35.4083333, 136.0125000 35.4041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral