メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.7625000 33.8125000, 133.7687500 33.8125000, 133.7687500 33.8166667, 133.7625000 33.8166667, 133.7625000 33.8125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral