メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.983074107982 43.5616297500484, 144.98302786378 43.561599353778, 144.982407549831 43.5612085610666, 144.983370957677 43.5604545212625, 144.983766070505 43.5606939228896, 144.983826408727 43.5610185101142, 144.983074107982 43.5616297500484)) ^^http://www.opengis.net/ont/geosparql#wktLiteral