メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.365367102967 43.0955854836121, 141.365815750772 43.0956321302559, 141.366381759876 43.0957058439595, 141.36609225178 43.0968365648563, 141.365540612637 43.096763947337, 141.365090233609 43.0966971022501, 141.364566859911 43.0966277229222, 141.364846402586 43.0955178114475, 141.365367102967 43.0955854836121)) ^^http://www.opengis.net/ont/geosparql#wktLiteral