メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.153815194958 35.1040433590466, 137.153606392337 35.106135991256, 137.149278284205 35.1047706150347, 137.150112404588 35.1028951011463, 137.153815194958 35.1040433590466)) ^^http://www.opengis.net/ont/geosparql#wktLiteral