メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.260444098141 44.0281443994629, 144.259138517308 44.0276873282569, 144.259492069263 44.0271563554441, 144.260784309751 44.0276167941552, 144.260444098141 44.0281443994629)) ^^http://www.opengis.net/ont/geosparql#wktLiteral