メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.360380818698 43.7677677555188, 142.360686297635 43.768303394877, 142.359164476587 43.7687460417478, 142.358900257251 43.7681955044078, 142.358594456506 43.7676410524994, 142.360082111226 43.7672184318974, 142.360372540802 43.767752539949, 142.360380818698 43.7677677555188)) ^^http://www.opengis.net/ont/geosparql#wktLiteral