メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.1937500 34.7583333, 134.2000000 34.7583333, 134.2000000 34.7625000, 134.1937500 34.7625000, 134.1937500 34.7583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral