メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.399036981492 43.7869540651477, 142.400135781468 43.787612898936, 142.398923125627 43.7886184953779, 142.398525819467 43.7883716488471, 142.397841194062 43.7879479908307, 142.39763765264 43.7878095930049, 142.396844184432 43.7873233055204, 142.398031207309 43.7863405646727, 142.398483830458 43.7866273735771, 142.399036981492 43.7869540651477)) ^^http://www.opengis.net/ont/geosparql#wktLiteral