メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.476972637126 43.457741027043, 142.477501245293 43.4574967181829, 142.478863140386 43.4590591930036, 142.478648425255 43.4591602253206, 142.478343155672 43.4593135826138, 142.477745576397 43.4595891523097, 142.477128939463 43.459862294538, 142.476791173308 43.459467729986, 142.47643994207 43.4590732235593, 142.476094355556 43.4586827504052, 142.475768954089 43.4582938901178, 142.47637254095 43.4579993654177, 142.476972637126 43.457741027043)) ^^http://www.opengis.net/ont/geosparql#wktLiteral