メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.050377624657 42.9071518501748, 143.051144469154 42.9072043050405, 143.051080488565 42.9077156515709, 143.050986497336 42.908465847714, 143.050194700029 42.9084159575266, 143.049517728183 42.9083670197381, 143.049407788592 42.9083589246649, 143.049568846893 42.9070970810021, 143.0496709015 42.9071020656761, 143.050377624657 42.9071518501748)) ^^http://www.opengis.net/ont/geosparql#wktLiteral