メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.846238127449 38.7582568560051, 139.845691481051 38.7583126320904, 139.845723999736 38.7584055277073, 139.844775061599 38.7585299748277, 139.844712534847 38.7579403617781, 139.844652737376 38.7575897836646, 139.846103848314 38.7574459248918, 139.846238127449 38.7582568560051)) ^^http://www.opengis.net/ont/geosparql#wktLiteral