メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.584100612246 43.3362644782693, 145.583719943574 43.3367649308758, 145.582474543275 43.336273655896, 145.582384646267 43.3362294453937, 145.582773126862 43.3357096436102, 145.584100612246 43.3362644782693)) ^^http://www.opengis.net/ont/geosparql#wktLiteral