メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.005957687106 34.8982239302036, 137.004960496237 34.8987637039678, 137.004946341746 34.8987454437926, 137.003978585187 34.8974951794889, 137.003928397876 34.8974239867196, 137.005320759999 34.8967372033129, 137.006312279301 34.8980142425604, 137.005957687106 34.8982239302036)) ^^http://www.opengis.net/ont/geosparql#wktLiteral