メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.37672520395 43.0417548134352, 141.377852750502 43.0410739597704, 141.378372664124 43.0415254306793, 141.377083960205 43.0422991634863, 141.376577157287 43.0418496854057, 141.37672520395 43.0417548134352)) ^^http://www.opengis.net/ont/geosparql#wktLiteral