メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.902519449548 43.495414887467, 141.900646081564 43.4957039966411, 141.900195306072 43.4950372670108, 141.899958765708 43.4947158227837, 141.901691106954 43.494479637602, 141.902333311818 43.4943827793933, 141.902658072614 43.4953934723154, 141.902519449548 43.495414887467)) ^^http://www.opengis.net/ont/geosparql#wktLiteral