メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.5500000 42.2833333, 142.5562500 42.2833333, 142.5562500 42.2875000, 142.5500000 42.2875000, 142.5500000 42.2833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral