メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.796045308761 34.0637800668698, 131.796512168578 34.0641948110735, 131.795390865964 34.0650697849119, 131.794047905889 34.0661220028351, 131.793528829866 34.065493663386, 131.792887041518 34.0647788699939, 131.794205073842 34.0640553953611, 131.794713755219 34.0637654659657, 131.795521047275 34.0633128820748, 131.796045308761 34.0637800668698)) ^^http://www.opengis.net/ont/geosparql#wktLiteral