メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.329067254363 43.0685666816488, 141.328009084934 43.0684195310286, 141.327504086371 43.0683519488316, 141.327649236753 43.067769249147, 141.327788082905 43.0672166679815, 141.32857542203 43.0673261911702, 141.329355681597 43.0674217968244, 141.329067254363 43.0685666816488)) ^^http://www.opengis.net/ont/geosparql#wktLiteral