メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.37357277906 34.968288518861, 138.374065469777 34.968079196737, 138.374085439584 34.9681117547606, 138.374467433199 34.9686940849727, 138.374841624659 34.9692826737427, 138.374532852999 34.9694228606061, 138.374437598386 34.9694638224308, 138.374408208818 34.9694227332926, 138.373947824497 34.9696219233388, 138.373554346427 34.9690598627888, 138.372996411791 34.9693261351726, 138.372778179794 34.9690283548966, 138.372552015222 34.968722185002, 138.37357277906 34.968288518861)) ^^http://www.opengis.net/ont/geosparql#wktLiteral