メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.000722217873 43.5655840400643, 145.000237683675 43.5652520249412, 144.999856707319 43.565010968148, 144.999990745181 43.5648921371096, 145.000048358773 43.5648449730044, 145.000713448346 43.5642921469379, 145.001608216251 43.5648749494122, 145.000722217873 43.5655840400643)) ^^http://www.opengis.net/ont/geosparql#wktLiteral