メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.204557198356 42.9462359172671, 143.203768984614 42.9462832652656, 143.203663312031 42.945317244921, 143.203801807551 42.9452906330998, 143.203811449846 42.9452887947737, 143.204393847388 42.9452367584667, 143.204557198356 42.9462359172671)) ^^http://www.opengis.net/ont/geosparql#wktLiteral