メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.746274096776 35.0340932318492, 136.755261670813 35.0395264443973, 136.754262547579 35.0409729889433, 136.752425949718 35.0436603239216, 136.751864603878 35.0444674921156, 136.74308988757 35.0391833485025, 136.743623325995 35.0383140677726, 136.746274096776 35.0340932318492)) ^^http://www.opengis.net/ont/geosparql#wktLiteral