メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.365215261225 43.7701910089195, 142.365866710097 43.7713434676473, 142.366318311157 43.7721340931134, 142.366447142712 43.7723812478386, 142.364917284462 43.77283956844, 142.364600841089 43.7722966510915, 142.364281723275 43.7717540005687, 142.363955868656 43.7711930542912, 142.363660945573 43.7706555294182, 142.363358541747 43.7701044045717, 142.364919828495 43.769650006452, 142.365215261225 43.7701910089195)) ^^http://www.opengis.net/ont/geosparql#wktLiteral