メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.6250000 34.2166667, 133.6312500 34.2166667, 133.6312500 34.2208334, 133.6250000 34.2208334, 133.6250000 34.2166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral