メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.97795806649 43.5527192229824, 144.97777906891 43.5528619190121, 144.977440875244 43.5525837994726, 144.977273995475 43.5524467258294, 144.977815646695 43.5520405004981, 144.978334218027 43.5524205980108, 144.97795806649 43.5527192229824)) ^^http://www.opengis.net/ont/geosparql#wktLiteral