メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.33233439712 43.0556951305981, 141.330792683742 43.0554912426681, 141.33094651718 43.0548559282621, 141.330957349904 43.054811285384, 141.330985886432 43.0546922360827, 141.331077367603 43.0543591881498, 141.331912547495 43.0544524004435, 141.332613242503 43.0545282818921, 141.33233439712 43.0556951305981)) ^^http://www.opengis.net/ont/geosparql#wktLiteral