メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.924006751799 43.5375179004883, 141.923361209806 43.5376059061092, 141.923023723809 43.5376518869189, 141.922428531137 43.5377329975948, 141.921864744631 43.5358433536675, 141.922709894055 43.5356976962072, 141.922735461351 43.5356932682607, 141.92341813899 43.5355755891342, 141.923714492939 43.5365533787899, 141.923882714789 43.5371084006342, 141.923976644231 43.5374183057416, 141.924006751799 43.5375179004883)) ^^http://www.opengis.net/ont/geosparql#wktLiteral