メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.7062500 35.2958334, 133.7125000 35.2958334, 133.7125000 35.3000000, 133.7062500 35.3000000, 133.7062500 35.2958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral