メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.414291161364 43.7430836971678, 142.414342588369 43.7435783485976, 142.412445998132 43.7436717929269, 142.410358538141 43.7437904530406, 142.410294642101 43.743304886435, 142.41024324772 43.7428057143866, 142.412349480845 43.7426961213187, 142.414220968838 43.7425890902666, 142.414291161364 43.7430836971678)) ^^http://www.opengis.net/ont/geosparql#wktLiteral