メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.932803194498 35.0862861373138, 136.931421765597 35.0857946964735, 136.931810465776 35.0850487006707, 136.933204119575 35.0855607954515, 136.932803194498 35.0862861373138)) ^^http://www.opengis.net/ont/geosparql#wktLiteral