メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.331207369026 43.0476779441643, 141.33208511613 43.0477397067859, 141.332042378212 43.0480783521538, 141.332027374825 43.048197018364, 141.332000071987 43.0484136962362, 141.331968858396 43.0486612166142, 141.331959073848 43.0487385011058, 141.331996630771 43.048740771252, 141.331946973056 43.0490996870138, 141.330831745901 43.0490265214523, 141.330230210485 43.0489805433178, 141.33027669595 43.0486357400391, 141.330327464719 43.0483122802103, 141.330360705065 43.0480451546377, 141.330409577273 43.0476239922648, 141.330801853069 43.0476511974879, 141.331207369026 43.0476779441643)) ^^http://www.opengis.net/ont/geosparql#wktLiteral