メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.32623515805 43.0740055930235, 141.325481830105 43.0743341284419, 141.324966739099 43.0745518490443, 141.324461489708 43.0739112091743, 141.324546818523 43.073876454203, 141.325478412143 43.0734636360804, 141.32552758853 43.073434284488, 141.325724195972 43.0733423369711, 141.32623515805 43.0740055930235)) ^^http://www.opengis.net/ont/geosparql#wktLiteral