メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.840858860522 43.0757623944318, 142.840720298529 43.0757345565855, 142.840130815444 43.075616072045, 142.839850797956 43.0755589329617, 142.839285139998 43.075443345776, 142.839333073838 43.0753346490381, 142.839380666089 43.0749750858239, 142.839996953385 43.0736383027474, 142.841450613647 43.0739620437006, 142.841634147734 43.0740028695266, 142.840858860522 43.0757623944318)) ^^http://www.opengis.net/ont/geosparql#wktLiteral