メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.871438077614 43.0121866402605, 142.870743551277 43.0117452883896, 142.870242631627 43.011442699302, 142.871186103471 43.0106221261964, 142.872253778283 43.0112557006461, 142.872286602479 43.0112273206495, 142.872432915259 43.011319290914, 142.871438077614 43.0121866402605)) ^^http://www.opengis.net/ont/geosparql#wktLiteral