メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.271447240198 44.0188966892368, 144.27134195763 44.0194627758751, 144.269777425567 44.019313788689, 144.269889517111 44.0187584280561, 144.271447240198 44.0188966892368)) ^^http://www.opengis.net/ont/geosparql#wktLiteral