メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.0062500 32.9625000, 129.0125000 32.9625000, 129.0125000 32.9666667, 129.0062500 32.9666667, 129.0062500 32.9625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral