メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.92078421192 43.5379596268899, 141.9201518751 43.5380521851257, 141.919170216171 43.5365061270144, 141.91911700667 43.5364701790869, 141.91820995408 43.5358567239696, 141.92008239818 43.5355468924221, 141.920296031832 43.5363151667989, 141.92051114341 43.5370886854235, 141.92078421192 43.5379596268899)) ^^http://www.opengis.net/ont/geosparql#wktLiteral