メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.796376244014 35.4438411840563, 136.794216832554 35.4435458487382, 136.794487014676 35.4427750839672, 136.796472311828 35.4430540009505, 136.796376244014 35.4438411840563)) ^^http://www.opengis.net/ont/geosparql#wktLiteral