メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.987209989851 43.5621386272212, 144.986618179238 43.5625524247, 144.986221552402 43.5612132208616, 144.986611299802 43.5615472136003, 144.986914583846 43.5618338436611, 144.987209989851 43.5621386272212)) ^^http://www.opengis.net/ont/geosparql#wktLiteral