メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.323818927361 43.0842184974399, 141.323951621157 43.0843208463523, 141.324493176212 43.0848111351567, 141.323959609153 43.0851346871583, 141.323132893394 43.0856242972463, 141.322818034007 43.0853340982862, 141.322469061981 43.0850092308742, 141.322101794697 43.0846888553429, 141.322955102661 43.0841980612852, 141.323468923026 43.0838857469071, 141.323818927361 43.0842184974399)) ^^http://www.opengis.net/ont/geosparql#wktLiteral