メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.6312500 33.9458334, 133.6375000 33.9458334, 133.6375000 33.9500000, 133.6312500 33.9500000, 133.6312500 33.9458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral