メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.979788285344 43.5542674032594, 144.978744111756 43.5548676961572, 144.976383616561 43.5539950818694, 144.97777906891 43.5528619190121, 144.979380925673 43.5539825029243, 144.979788285344 43.5542674032594)) ^^http://www.opengis.net/ont/geosparql#wktLiteral