メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.751827642007 43.1960869627862, 141.751120246494 43.196837311671, 141.751056808598 43.196801166897, 141.750218348587 43.1963703398372, 141.750116689582 43.196318134758, 141.750838339073 43.1955710211004, 141.751732017781 43.1960371078899, 141.751827642007 43.1960869627862)) ^^http://www.opengis.net/ont/geosparql#wktLiteral