メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.903713039011 43.4733370232455, 141.903726226691 43.4733737018877, 141.90396685293 43.4741789028513, 141.90400103971 43.4743043232107, 141.902691271102 43.474498794462, 141.90218578424 43.4745813395697, 141.902175055897 43.4745450543697, 141.902215898281 43.4745375482427, 141.901935686442 43.4735848240033, 141.901923341 43.4735448072486, 141.901510767869 43.4722088344192, 141.902067637909 43.4721296125452, 141.903308024959 43.4719271335235, 141.903713039011 43.4733370232455)) ^^http://www.opengis.net/ont/geosparql#wktLiteral