メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.6125000 33.6166667, 133.6187500 33.6166667, 133.6187500 33.6208334, 133.6125000 33.6208334, 133.6125000 33.6166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral