メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.2812500 35.0166667, 132.2875000 35.0166667, 132.2875000 35.0208334, 132.2812500 35.0208334, 132.2812500 35.0166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral