メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.342512070316 43.7645932746314, 142.342295746877 43.7650091554873, 142.342248294787 43.7650781266209, 142.341946504072 43.7655545876417, 142.341394359319 43.7666603808134, 142.341293597238 43.7666822785808, 142.339878062912 43.7669900184196, 142.339538968445 43.7670686794828, 142.340584172928 43.7651432058377, 142.340876682054 43.764677725408, 142.340892392533 43.7646527490574, 142.341171038015 43.7641786470265, 142.34146155218 43.7636916136067, 142.342814453351 43.764106227272, 142.342512070316 43.7645932746314)) ^^http://www.opengis.net/ont/geosparql#wktLiteral