メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.347905334751 43.0343576843878, 141.347858506703 43.0347206407942, 141.347821101247 43.0350489289665, 141.346986207501 43.0349857268952, 141.346470294041 43.034948035547, 141.345855066088 43.0349030878344, 141.345842122029 43.0348639516963, 141.34593279638 43.0342187548778, 141.345988186371 43.0337043748242, 141.347980072347 43.0338564668125, 141.347905334751 43.0343576843878)) ^^http://www.opengis.net/ont/geosparql#wktLiteral