メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.770996108462 35.0806023183704, 136.768384769764 35.0805345245143, 136.765785063676 35.0804715004071, 136.765849566261 35.078926510518, 136.771047433989 35.079056172405, 136.770996108462 35.0806023183704)) ^^http://www.opengis.net/ont/geosparql#wktLiteral