メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.821489966372 34.7117556242251, 137.820878654513 34.7118400915971, 137.820357855065 34.7119164719871, 137.820355686881 34.7112134632312, 137.82086253515 34.711204756114, 137.821442939461 34.7111863166325, 137.821453887245 34.7113389214283, 137.821489966372 34.7117556242251)) ^^http://www.opengis.net/ont/geosparql#wktLiteral