メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.1250000 33.2958334, 134.1312500 33.2958334, 134.1312500 33.3000000, 134.1250000 33.3000000, 134.1250000 33.2958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral