メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.274594307383 44.0191966106422, 144.274576701756 44.0191946549047, 144.27457257025 44.019216392627, 144.273009593269 44.0190503516796, 144.273110767476 44.0184843346065, 144.274675713183 44.0186456870742, 144.274594307383 44.0191966106422)) ^^http://www.opengis.net/ont/geosparql#wktLiteral