メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.985399527256 43.54385020356, 144.984678763255 43.5444228391896, 144.98376792513 43.5437990485938, 144.984459672221 43.5432387844612, 144.985399527256 43.54385020356)) ^^http://www.opengis.net/ont/geosparql#wktLiteral