メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.372138356229 43.0779150145766, 141.372487824039 43.0781601167347, 141.371622206447 43.0790871668291, 141.371145767132 43.0790190201708, 141.371089811162 43.0790138078168, 141.370366994846 43.078918938853, 141.370637977853 43.0786145981064, 141.370679772506 43.0785702596971, 141.370967391226 43.0782564109016, 141.37116462983 43.0780431403352, 141.371628846627 43.0775501092229, 141.371696579202 43.0775905053025, 141.372138356229 43.0779150145766)) ^^http://www.opengis.net/ont/geosparql#wktLiteral