メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.128453272266 39.847444561245, 141.129292787735 39.8477574218373, 141.128908886526 39.8481974453692, 141.128824711931 39.8481919800118, 141.127894198947 39.8480952274614, 141.127169278873 39.8481305029782, 141.127134863183 39.8474803216625, 141.128453272266 39.847444561245)) ^^http://www.opengis.net/ont/geosparql#wktLiteral