メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.0000000 33.0000000, 133.0062500 33.0000000, 133.0062500 33.0041667, 133.0000000 33.0041667, 133.0000000 33.0000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral