メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.426866248789 43.0511673043115, 141.427045059283 43.0516728582192, 141.42635060632 43.0518626812773, 141.425581318741 43.0521621692649, 141.424933696326 43.0525136588181, 141.424382545582 43.0528364422729, 141.423566544769 43.0520553765064, 141.424202481972 43.0517960135585, 141.425493770867 43.0512658120791, 141.426720150806 43.0507544710335, 141.426866248789 43.0511673043115)) ^^http://www.opengis.net/ont/geosparql#wktLiteral