メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.377458550834 42.9851710632889, 144.375732115517 42.9848727895307, 144.375926540169 42.984272022796, 144.37751432112 42.984555505296, 144.377650608515 42.9845799037217, 144.377458550834 42.9851710632889)) ^^http://www.opengis.net/ont/geosparql#wktLiteral