メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.38759760275 43.7697749936726, 142.387543714677 43.7703031067932, 142.387530238664 43.7707837046118, 142.385719942379 43.7707268082019, 142.38574333276 43.7702431044411, 142.385769599533 43.7698075503008, 142.385778843513 43.7697016875332, 142.385798354787 43.769149986529, 142.385803431626 43.7691310815545, 142.387626899064 43.7692025183093, 142.38759760275 43.7697749936726)) ^^http://www.opengis.net/ont/geosparql#wktLiteral