メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.358785881784 43.1133377944057, 141.358676576972 43.1137510869098, 141.358639435429 43.1139021368722, 141.358547447009 43.1143259014789, 141.357020819664 43.114106331365, 141.357148440061 43.1135964868806, 141.357150887193 43.1135866609337, 141.357259016783 43.1131361595243, 141.357363109286 43.1127188889593, 141.358309764619 43.1128570285951, 141.358882812918 43.1129307377827, 141.358785881784 43.1133377944057)) ^^http://www.opengis.net/ont/geosparql#wktLiteral