メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.37175393799 43.0838419162153, 141.372354722369 43.083926486255, 141.37220054356 43.0845963824681, 141.372091256664 43.0850725852092, 141.370900557564 43.0849139294885, 141.371009610183 43.0844345622791, 141.371172101062 43.0837678269768, 141.37175393799 43.0838419162153)) ^^http://www.opengis.net/ont/geosparql#wktLiteral