メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.391053827861 43.0541988439577, 141.392052964162 43.0549478246642, 141.390997429109 43.0556780226658, 141.390404445619 43.0561111639883, 141.389195593997 43.055284776377, 141.388510734379 43.0552097870596, 141.388988512384 43.0548336699157, 141.389496018399 43.05449842463, 141.38997054169 43.0541778774389, 141.390560702364 43.0537792106946, 141.391053827861 43.0541988439577)) ^^http://www.opengis.net/ont/geosparql#wktLiteral