メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.490109091735 40.5045234419919, 141.490116209845 40.5046292559657, 141.490113630899 40.504629517428, 141.490121853157 40.5046787224949, 141.489886770888 40.5046938862575, 141.489869054572 40.5046542347816, 141.489577882621 40.5046836839323, 141.489560310265 40.5045263927607, 141.489942402264 40.5045148221323, 141.490109091735 40.5045234419919)) ^^http://www.opengis.net/ont/geosparql#wktLiteral