メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.345916083019 43.0975571587284, 141.345857777286 43.0977628301879, 141.345773035941 43.0980170304845, 141.345768416539 43.098030919217, 141.344700644725 43.0978738620787, 141.344294792791 43.0978079139457, 141.344408552615 43.0973497809178, 141.344312515981 43.0973347426717, 141.34437147642 43.0971435651683, 141.345959011218 43.0973659939329, 141.345916083019 43.0975571587284)) ^^http://www.opengis.net/ont/geosparql#wktLiteral