メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.750372917438 42.901546454335, 140.750340890638 42.9015455420706, 140.749254732314 42.9016024730945, 140.747587998904 42.9016893984249, 140.747497835196 42.9008597858534, 140.74917447917 42.9007182035793, 140.750289727681 42.9006484308202, 140.750372917438 42.901546454335)) ^^http://www.opengis.net/ont/geosparql#wktLiteral