メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.651661788519 43.9407477880612, 141.651459272552 43.9407767132488, 141.651336948329 43.9407860414423, 141.649883466997 43.9409550317194, 141.649507599069 43.940721086912, 141.649986833463 43.9403685219943, 141.650385744067 43.9400674889399, 141.650937372511 43.9396662451031, 141.651136719512 43.9395213659459, 141.651128764156 43.9394850965286, 141.652012562779 43.939360635906, 141.652126300678 43.9397707204726, 141.652253569207 43.9398988253157, 141.652532951941 43.9401573181157, 141.652481018316 43.9401928776688, 141.651661788519 43.9407477880612)) ^^http://www.opengis.net/ont/geosparql#wktLiteral