メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.2375000 34.3625000, 135.2437500 34.3625000, 135.2437500 34.3666667, 135.2375000 34.3666667, 135.2375000 34.3625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral