メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.2812500 34.1875000, 129.2875000 34.1875000, 129.2875000 34.1916667, 129.2812500 34.1916667, 129.2812500 34.1875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral