メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.398662724662 44.1717509825397, 142.396768850986 44.171444764047, 142.397038607482 44.1705712809165, 142.398947414586 44.1708684739644, 142.398662724662 44.1717509825397)) ^^http://www.opengis.net/ont/geosparql#wktLiteral