メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.7437500 33.5583333, 133.7500000 33.5583333, 133.7500000 33.5625000, 133.7437500 33.5625000, 133.7437500 33.5583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral