メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.981490920653 43.5521672880581, 144.980705175035 43.551771757802, 144.98133692894 43.5512078172759, 144.981544719512 43.5513301600836, 144.98190632794 43.5515228346112, 144.98166956154 43.5518929228459, 144.981490920653 43.5521672880581)) ^^http://www.opengis.net/ont/geosparql#wktLiteral