メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.428523473225 43.8037538171835, 142.428881501109 43.8039628154017, 142.429207628045 43.8041733913516, 142.429542253098 43.8043839350102, 142.429904604003 43.8046113992399, 142.428767111101 43.8055561290346, 142.428434551284 43.8053316916008, 142.428080798865 43.8051257802014, 142.427746180569 43.8049213853064, 142.427422145495 43.8047000079786, 142.426676183707 43.8042389243099, 142.427796877577 43.8032784710457, 142.428523473225 43.8037538171835)) ^^http://www.opengis.net/ont/geosparql#wktLiteral