メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.755170998399 42.9029430854371, 140.755142976626 42.9029427192505, 140.755056289832 42.9021468427133, 140.755832987443 42.9021088129, 140.755919573613 42.902909260314, 140.755170998399 42.9029430854371)) ^^http://www.opengis.net/ont/geosparql#wktLiteral