メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.344138253104 43.0070346021005, 141.344029418971 43.0067522761969, 141.343963404602 43.0065558123111, 141.343907795191 43.0063881959336, 141.34380186817 43.0060516681482, 141.345305268491 43.0057795693764, 141.345428442842 43.0061690497681, 141.34557724542 43.0065688611013, 141.345617864979 43.0066480227981, 141.344912572174 43.0068307211313, 141.344138253104 43.0070346021005)) ^^http://www.opengis.net/ont/geosparql#wktLiteral