メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.7250000 35.1958334, 133.7312500 35.1958334, 133.7312500 35.2000000, 133.7250000 35.2000000, 133.7250000 35.1958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral