メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.648040516589 32.4667593959507, 131.64686543706 32.4668033611855, 131.646878732561 32.465814461631, 131.646888456322 32.4650933424172, 131.647219972755 32.4651115455304, 131.648135913406 32.4655041438003, 131.647989543612 32.4663957229474, 131.648040516589 32.4667593959507)) ^^http://www.opengis.net/ont/geosparql#wktLiteral