メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.831796873436 37.4117277645534, 138.831584131554 37.4117603231144, 138.831605696697 37.411847415659, 138.831532239055 37.4119996837596, 138.831402228695 37.4121209955614, 138.831133712383 37.4123391416377, 138.829172111966 37.4099068589135, 138.828193951036 37.4104146221132, 138.82670277913 37.4094856929348, 138.826193706942 37.4085105247305, 138.826341323899 37.408312855305, 138.82684996555 37.4076770146799, 138.826962195964 37.4076924734472, 138.828124352111 37.4071102894494, 138.831796873436 37.4117277645534)) ^^http://www.opengis.net/ont/geosparql#wktLiteral