メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.941618787077 42.9433471258931, 142.941600240173 42.9433578579174, 142.940550458502 42.943974731796, 142.940478323804 42.9440175054813, 142.940447606178 42.9440356952929, 142.940267708458 42.9438717123542, 142.939324707073 42.9430121051485, 142.939402372354 42.9429673291969, 142.940509487002 42.9423245896223, 142.940567072248 42.9423761476523, 142.941546591432 42.9432732919786, 142.941618787077 42.9433471258931)) ^^http://www.opengis.net/ont/geosparql#wktLiteral