メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.17881819743 34.7795267003467, 137.178517755207 34.7796281433271, 137.178517716989 34.7794027768043, 137.178476632268 34.7787492150376, 137.178162384598 34.7779942552988, 137.178531210419 34.7778098374317, 137.178853845949 34.7777040231166, 137.17962376652 34.7783434420317, 137.179473564038 34.7784786776385, 137.179309713755 34.7786815246452, 137.179214138892 34.7788392912672, 137.17914589255 34.7790533969782, 137.17913014776 34.7792358045426, 137.17881819743 34.7795267003467)) ^^http://www.opengis.net/ont/geosparql#wktLiteral