メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.316086247742 42.2834613456864, 143.316699657416 42.2837178674491, 143.316187359456 42.2843739533288, 143.31615606801 42.2844170092757, 143.315552729626 42.2841626420067, 143.315469349123 42.2841275433335, 143.314866493602 42.2838733092696, 143.314912359666 42.2838125333615, 143.31539776862 42.2831735836416, 143.31598875172 42.283420610978, 143.316086247742 42.2834613456864)) ^^http://www.opengis.net/ont/geosparql#wktLiteral