メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.8312500 33.7833333, 133.8375000 33.7833333, 133.8375000 33.7875000, 133.8312500 33.7875000, 133.8312500 33.7833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral