メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.861848273258 43.3203352318972, 141.862315342506 43.3220213097572, 141.861926310443 43.3220842741291, 141.861196811655 43.3222000941873, 141.861119512251 43.3222110845207, 141.859548297746 43.3224364206972, 141.859248753388 43.3213951769255, 141.859061937506 43.3207210778121, 141.858940022685 43.3202938401322, 141.858659987544 43.3192182012587, 141.860335723262 43.3189139735025, 141.861421176878 43.3188225054945, 141.861848273258 43.3203352318972)) ^^http://www.opengis.net/ont/geosparql#wktLiteral