メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.497123672673 35.8908916178473, 140.497233872543 35.8907628071078, 140.497340911941 35.890633581942, 140.497544176692 35.8902881173241, 140.497942380224 35.8903378504425, 140.497908722092 35.8904310419768, 140.497538601247 35.8910422658927, 140.497123672673 35.8908916178473)) ^^http://www.opengis.net/ont/geosparql#wktLiteral