メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.322816449376 43.7653351835875, 142.323455530408 43.765535911821, 142.323151927042 43.7660728007253, 142.322827687381 43.7666214620887, 142.32218357303 43.7664136849777, 142.321541461986 43.7662303221142, 142.321654175865 43.7660507736354, 142.322178259691 43.7651512589753, 142.322274581639 43.7651761086971, 142.322816449376 43.7653351835875)) ^^http://www.opengis.net/ont/geosparql#wktLiteral