メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.5250000 33.9958334, 134.5312500 33.9958334, 134.5312500 34.0000000, 134.5250000 34.0000000, 134.5250000 33.9958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral