メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.187165417577 34.7897797288967, 137.186836751425 34.7898726117484, 137.186304609458 34.7884727576207, 137.186801312093 34.7883287150161, 137.187322715289 34.7896192662851, 137.187312516888 34.7896296720308, 137.18730175045 34.789640654821, 137.187274539401 34.7896684124864, 137.187251483732 34.7896919306695, 137.187227213329 34.7897166876904, 137.187165417577 34.7897797288967)) ^^http://www.opengis.net/ont/geosparql#wktLiteral