メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.330169254906 43.0975929780407, 141.329727429346 43.0978025153346, 141.329337100314 43.0979825755254, 141.32889003225 43.0981957950021, 141.328223348629 43.097412869803, 141.328666700892 43.0972103839145, 141.328768088632 43.0971627444131, 141.329060716862 43.097027471424, 141.329496240492 43.0968282949071, 141.329765553589 43.0971281635238, 141.329980998871 43.0973915195265, 141.330123999445 43.0975516122384, 141.330169254906 43.0975929780407)) ^^http://www.opengis.net/ont/geosparql#wktLiteral