メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.985337239513 43.5448317257607, 144.984678763255 43.5444228391896, 144.985399527256 43.54385020356, 144.986038159908 43.5442691592646, 144.985337239513 43.5448317257607)) ^^http://www.opengis.net/ont/geosparql#wktLiteral