メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.767178255665 43.1834474480788, 141.765968359868 43.1837384103436, 141.765309121793 43.1838973702776, 141.764794509839 43.1840089078674, 141.764815188231 43.1838548367272, 141.764716035944 43.1836263415513, 141.765106111277 43.1831961137631, 141.765683330885 43.1825905761829, 141.765768739365 43.1826306737871, 141.766166648491 43.1828326532652, 141.766207340423 43.1828520951775, 141.767145549379 43.1833290888949, 141.767178255665 43.1834474480788)) ^^http://www.opengis.net/ont/geosparql#wktLiteral