メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.400554476505 33.1632266974859, 130.400491006645 33.1629590626878, 130.401118080581 33.1628394797989, 130.401132352469 33.1629085858883, 130.401196660808 33.1631514092735, 130.400564694378 33.163269789364, 130.400554476505 33.1632266974859)) ^^http://www.opengis.net/ont/geosparql#wktLiteral