メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.942084804314 37.8008937422754, 140.939760458659 37.8006797603426, 140.938610590669 37.8005736928144, 140.93869413231 37.7987026121528, 140.942188232152 37.7987742713662, 140.942084804314 37.8008937422754)) ^^http://www.opengis.net/ont/geosparql#wktLiteral