メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.413506765836 43.7847933326245, 142.413859508645 43.7850062265749, 142.413864513917 43.7850092439108, 142.414184701178 43.7852114759347, 142.414518882516 43.7854144792725, 142.413283295285 43.7864874280278, 142.412944212326 43.7862531351824, 142.412617231007 43.7860553575246, 142.412275811999 43.7858436922334, 142.411215498875 43.7851826150548, 142.411878870995 43.7846304328779, 142.411950719563 43.7845712094604, 142.412475149827 43.7841270215797, 142.413506765836 43.7847933326245)) ^^http://www.opengis.net/ont/geosparql#wktLiteral