メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.420620832577 43.7528221411974, 142.420669198734 43.7532325374389, 142.419367841658 43.7532848757347, 142.419327553292 43.752910471019, 142.419289833663 43.7525177792851, 142.419293519928 43.752436518342, 142.420577828408 43.7522193206638, 142.420583649328 43.7523009546332, 142.420620832577 43.7528221411974)) ^^http://www.opengis.net/ont/geosparql#wktLiteral