メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.474307949849 36.3769699775185, 140.474888589589 36.3780175411273, 140.473972750706 36.3784420800905, 140.473308101919 36.377363557364, 140.47271081706 36.3763747949421, 140.473829319512 36.3759053488149, 140.474307949849 36.3769699775185)) ^^http://www.opengis.net/ont/geosparql#wktLiteral