メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.107870009751 43.8271531691243, 144.10651310385 43.827573446313, 144.106485072218 43.8275277375725, 144.105630599265 43.8261709076517, 144.107060164855 43.8257266390609, 144.10784665374 43.8271142404377, 144.107870009751 43.8271531691243)) ^^http://www.opengis.net/ont/geosparql#wktLiteral