メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.455401920214 43.0408183619137, 144.454375562027 43.0412651085915, 144.454375432329 43.0414487352968, 144.453545367105 43.0395282121049, 144.454681606508 43.0392589690459, 144.454726667682 43.0392483250783, 144.455401920214 43.0408183619137)) ^^http://www.opengis.net/ont/geosparql#wktLiteral