メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.878667421333 43.0167171624932, 142.878588475512 43.0170532768445, 142.878537470689 43.0172206585508, 142.878353029617 43.0171139944489, 142.877576506409 43.0166684905857, 142.87709448795 43.0171042843862, 142.877009237656 43.0170434233523, 142.876608413498 43.0168030483619, 142.877104611049 43.0163902470623, 142.877277143159 43.0164950085805, 142.877446069001 43.016603376024, 142.877826987691 43.0162307979106, 142.878494749705 43.0166129664268, 142.878667421333 43.0167171624932)) ^^http://www.opengis.net/ont/geosparql#wktLiteral