メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.052405821291 42.9000456930021, 143.052538364605 42.9000567214191, 143.053189417312 42.9010847244385, 143.052884275643 42.9010652002497, 143.052305359426 42.9010174178327, 143.051812946518 42.900986260249, 143.051926864888 42.9000259758893, 143.052405821291 42.9000456930021)) ^^http://www.opengis.net/ont/geosparql#wktLiteral