メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.104130109507 34.669517511449, 138.102854306977 34.6701003066377, 138.101735948736 34.6707066973644, 138.101136979149 34.6699918686524, 138.100899052982 34.6697081070034, 138.102774805169 34.6690930601839, 138.104140442569 34.6686356362652, 138.104138238659 34.6690989097401, 138.104130109507 34.669517511449)) ^^http://www.opengis.net/ont/geosparql#wktLiteral