メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.9312500 37.6250000, 140.9375000 37.6250000, 140.9375000 37.6291667, 140.9312500 37.6291667, 140.9312500 37.6250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral