メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.327985485013 43.7630291279195, 142.328369365008 43.7631470051671, 142.32906246523 43.7633637672866, 142.329087871268 43.7633716968008, 142.329471086998 43.7634967257056, 142.328829171041 43.7645964695822, 142.328603938702 43.7645199919395, 142.328417649503 43.7644712997074, 142.328096573307 43.7643652820977, 142.327712755476 43.7642454526329, 142.327573366707 43.7642019477116, 142.327323652035 43.7641246055928, 142.32705412609 43.7640414921511, 142.326939119132 43.7640064616541, 142.327601606564 43.7629112664472, 142.327985485013 43.7630291279195)) ^^http://www.opengis.net/ont/geosparql#wktLiteral