メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.4187500 34.5375000, 129.4250000 34.5375000, 129.4250000 34.5416667, 129.4187500 34.5416667, 129.4187500 34.5375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral