メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.6000000 44.1375000, 142.6062500 44.1375000, 142.6062500 44.1416667, 142.6000000 44.1416667, 142.6000000 44.1375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral