メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.344373265109 43.7737110803075, 142.344603201671 43.7741573050093, 142.344674400154 43.7742826633735, 142.343816704909 43.774519926734, 142.343474507039 43.7739621058569, 142.34313444658 43.7740678178635, 142.34282168002 43.7734584595797, 142.344026020859 43.7731261744965, 142.344373265109 43.7737110803075)) ^^http://www.opengis.net/ont/geosparql#wktLiteral