メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.4125000 33.5125000, 133.4187500 33.5125000, 133.4187500 33.5166667, 133.4125000 33.5166667, 133.4125000 33.5125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral