メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.051345380157 42.9109454590443, 143.052113387747 42.910995436409, 143.05197792682 42.9121409016981, 143.051187521353 42.9120910797083, 143.050432819235 42.9120424810717, 143.050591158397 42.9108958033368, 143.051345380157 42.9109454590443)) ^^http://www.opengis.net/ont/geosparql#wktLiteral