メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.8937500 35.4583333, 132.9000000 35.4583333, 132.9000000 35.4625000, 132.8937500 35.4625000, 132.8937500 35.4583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral