メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.380459411025 43.0355163020046, 141.380907702089 43.0360952896366, 141.380910443542 43.0361455963804, 141.379340989998 43.0360219894863, 141.379380270796 43.0357592518649, 141.379425810361 43.0354742677122, 141.379469646355 43.0353167097468, 141.380019395314 43.0349561535148, 141.380459411025 43.0355163020046)) ^^http://www.opengis.net/ont/geosparql#wktLiteral