メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.099619560135 43.8188371355833, 144.098199012829 43.8192680164575, 144.097268621325 43.8176563004098, 144.09867525561 43.8172225258385, 144.099273615787 43.8170380539144, 144.099814839124 43.8179592452047, 144.099214766681 43.8181451021514, 144.099619560135 43.8188371355833)) ^^http://www.opengis.net/ont/geosparql#wktLiteral