メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.347109964843 43.0674780339208, 141.346672774275 43.0674169106713, 141.345691480643 43.0672658219978, 141.345599562257 43.067247723268, 141.345555374287 43.067239004317, 141.345845052186 43.0661044890726, 141.347408711186 43.0663315589119, 141.347109964843 43.0674780339208)) ^^http://www.opengis.net/ont/geosparql#wktLiteral