メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.839850797956 43.0755589329617, 142.840130815444 43.075616072045, 142.840720298529 43.0757345565855, 142.840858860522 43.0757623944318, 142.840241806796 43.0771592479079, 142.840142768438 43.0771363392134, 142.839289349839 43.0769387557567, 142.838687423315 43.0767992997092, 142.839285139998 43.075443345776, 142.839850797956 43.0755589329617)) ^^http://www.opengis.net/ont/geosparql#wktLiteral