メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.898261797072 43.012039983845, 142.897799569318 43.0124585246184, 142.897748629883 43.012503893482, 142.896690354231 43.0118335737338, 142.896469565191 43.0117029503414, 142.896507296187 43.0116681359468, 142.897487048846 43.0108269517123, 142.898745247289 43.0115990262071, 142.898261797072 43.012039983845)) ^^http://www.opengis.net/ont/geosparql#wktLiteral