メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.705280696922 44.3644291921104, 141.705241058347 44.3644547038764, 141.704246832572 44.3636626968816, 141.704160483156 44.3635939022892, 141.705097326205 44.3629839025602, 141.705180656999 44.362928999475, 141.706276712774 44.3637906377304, 141.705765526639 44.3641176591375, 141.705280696922 44.3644291921104)) ^^http://www.opengis.net/ont/geosparql#wktLiteral