メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.1187500 33.9375000, 133.1250000 33.9375000, 133.1250000 33.9416667, 133.1187500 33.9416667, 133.1187500 33.9375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral