メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.352256256957 43.7657577324277, 142.352489503304 43.7661868253432, 142.352511566722 43.7662274118523, 142.352711651578 43.7665954980671, 142.352804797873 43.7667852071882, 142.352007039022 43.7670049822486, 142.351252971166 43.7672218106182, 142.350986382473 43.7667155562926, 142.351733715182 43.7665015585593, 142.351741836488 43.7664992271499, 142.351686366219 43.7663934442987, 142.351478624926 43.765997249988, 142.35069043144 43.7644940195557, 142.351464213275 43.7642792603797, 142.351974991548 43.7652402890685, 142.352256256957 43.7657577324277)) ^^http://www.opengis.net/ont/geosparql#wktLiteral