メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.148050983757 36.7642450486467, 137.14735837927 36.7644762903648, 137.146390445618 36.764884904627, 137.146399573714 36.7648423103855, 137.145625876778 36.7636895641303, 137.146858641126 36.7631307543809, 137.147408381234 36.7628737918948, 137.148480684171 36.7624337856325, 137.149300219737 36.7637694351333, 137.148050983757 36.7642450486467)) ^^http://www.opengis.net/ont/geosparql#wktLiteral