メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.794487014676 35.4427750839672, 136.792650432949 35.4422065998282, 136.794058206158 35.4391669232294, 136.795874651709 35.4394593920092, 136.794487014676 35.4427750839672)) ^^http://www.opengis.net/ont/geosparql#wktLiteral