メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.083770871176 43.5358767771206, 142.083661530239 43.5364297167049, 142.083275331303 43.53671514987, 142.082416686401 43.5366546893078, 142.08259964053 43.5357656413089, 142.08329161995 43.5358265207068, 142.083770871176 43.5358767771206)) ^^http://www.opengis.net/ont/geosparql#wktLiteral