メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.002122068524 34.9993534518267, 137.000704941163 34.9995232084733, 137.000584842541 34.9984871431067, 137.001961589133 34.9983045849885, 137.002015425033 34.9988040512281, 137.002122068524 34.9993534518267)) ^^http://www.opengis.net/ont/geosparql#wktLiteral