メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.982273550712 43.5492704326181, 144.981831785764 43.5496181055056, 144.981034123161 43.5490823308847, 144.981761120771 43.548495893647, 144.982594874877 43.5490088613307, 144.982273550712 43.5492704326181)) ^^http://www.opengis.net/ont/geosparql#wktLiteral