メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.762648960344 43.1962090611391, 141.762030133544 43.1959034504977, 141.76209470338 43.1958464082291, 141.761823650966 43.1957050881703, 141.762533110667 43.1949596792763, 141.762691338158 43.1952126210856, 141.762849484508 43.1953791286054, 141.763033158704 43.1955027032253, 141.763235877503 43.1956064560111, 141.762695062681 43.1961594655656, 141.762648960344 43.1962090611391)) ^^http://www.opengis.net/ont/geosparql#wktLiteral