メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9250000 33.9833333, 130.9312500 33.9833333, 130.9312500 33.9875000, 130.9250000 33.9875000, 130.9250000 33.9833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral