メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((124.3125000 24.5958334, 124.3187500 24.5958334, 124.3187500 24.6000000, 124.3125000 24.6000000, 124.3125000 24.5958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral