メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.634403984023 35.3580030648966, 136.633176527732 35.35794708719, 136.633220777071 35.3574598878611, 136.634434501821 35.3575177757768, 136.634403984023 35.3580030648966)) ^^http://www.opengis.net/ont/geosparql#wktLiteral