メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.376541643871 43.7497793083569, 142.376292052256 43.7499867333369, 142.376100973524 43.749712916276, 142.375941744761 43.7495113738947, 142.375725365055 43.749267560404, 142.375046265535 43.7484801006139, 142.375805867788 43.7482142129478, 142.376945920377 43.7477939688058, 142.377618211038 43.7488588593605, 142.377637314989 43.748884153917, 142.376541643871 43.7497793083569)) ^^http://www.opengis.net/ont/geosparql#wktLiteral