メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.983098220744 43.5497959540743, 144.982273550712 43.5492704326181, 144.982594874877 43.5490088613307, 144.982854793576 43.5488004415912, 144.983373248288 43.5483872921661, 144.983397670753 43.5483672633674, 144.984192247216 43.5488815768697, 144.983098220744 43.5497959540743)) ^^http://www.opengis.net/ont/geosparql#wktLiteral