メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.3618527068 43.7736894463262, 142.362055819258 43.7741024560785, 142.362428566629 43.7747449332567, 142.361836787033 43.7745654838297, 142.361210282825 43.7755794618525, 142.360298338629 43.7752857403665, 142.360262030163 43.7752713587627, 142.360603405739 43.7746023907253, 142.360104702375 43.7744571768002, 142.360307551273 43.7741183905705, 142.360265738255 43.774105368019, 142.360028567169 43.7736557514785, 142.36052799466 43.7735017657799, 142.361609620007 43.7731891546719, 142.3618527068 43.7736894463262)) ^^http://www.opengis.net/ont/geosparql#wktLiteral