メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.199647601473 34.8230863212502, 137.200112121581 34.8230073072809, 137.200330850201 34.82336783779, 137.199839062201 34.8236271572552, 137.199729685368 34.8234130859874, 137.199647601473 34.8230863212502)) ^^http://www.opengis.net/ont/geosparql#wktLiteral