メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.1937500 34.3375000, 135.2000000 34.3375000, 135.2000000 34.3416667, 135.1937500 34.3416667, 135.1937500 34.3375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral