メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.279243050395 44.0202401656062, 144.276063827391 44.0199310738268, 144.276176085844 44.0193708371689, 144.277371967559 44.0194813439061, 144.27988527802 44.0197342675807, 144.280025763329 44.0198247710098, 144.279464222129 44.0201137716166, 144.279243050395 44.0202401656062)) ^^http://www.opengis.net/ont/geosparql#wktLiteral