メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.907694582192 43.4835802639786, 141.906784862221 43.48371876445, 141.906581077513 43.4830507037495, 141.906412678019 43.4824614426673, 141.907321070022 43.4823282504883, 141.907694582192 43.4835802639786)) ^^http://www.opengis.net/ont/geosparql#wktLiteral