メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.034779530059 42.9132403239238, 143.033550679575 42.9131711475299, 143.033669454821 42.912252853392, 143.034897126269 42.9123436287356, 143.034779530059 42.9132403239238)) ^^http://www.opengis.net/ont/geosparql#wktLiteral