メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.344399246057 43.0958193579321, 141.344275498324 43.0963106772676, 141.344151789588 43.0967927128818, 141.343510425917 43.0967208866769, 141.342976094955 43.0966539140612, 141.343001315216 43.0965355896053, 141.343001771883 43.0965334462401, 141.343086937301 43.096133870149, 141.343096606395 43.0961095432087, 141.343205893111 43.095655736457, 141.343943659403 43.0957558971883, 141.344399246057 43.0958193579321)) ^^http://www.opengis.net/ont/geosparql#wktLiteral