メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.363837362899 43.0953809540356, 141.363860892296 43.0953864103794, 141.364308276119 43.0954472600073, 141.364846402586 43.0955178114475, 141.364566859911 43.0966277229222, 141.364036909529 43.0965552646908, 141.363563317908 43.0965011035249, 141.363023883685 43.0964276532727, 141.363295156356 43.0953140936772, 141.363837362899 43.0953809540356)) ^^http://www.opengis.net/ont/geosparql#wktLiteral