メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.831402541922 37.6347923588166, 138.830339006779 37.6346715858651, 138.829986396704 37.6365518322823, 138.828287223601 37.6363549618382, 138.828104113056 37.637376613901, 138.827927047739 37.6373606331377, 138.826950544583 37.6372867537108, 138.826637890045 37.6372255318948, 138.827432469266 37.6362506177356, 138.828163668457 37.6363386919513, 138.828349298084 37.6353974190796, 138.82813955165 37.635366465529, 138.82862100261 37.634781412101, 138.829625277376 37.633608929849, 138.83029296943 37.6328210344241, 138.83106817575 37.631855299414, 138.831777510328 37.6309699944631, 138.8327779571 37.6310622117399, 138.832424465025 37.6329644304277, 138.832101899958 37.6329256360353, 138.831933624577 37.6338858718548, 138.831595138084 37.6338452900144, 138.831402541922 37.6347923588166)) ^^http://www.opengis.net/ont/geosparql#wktLiteral