メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.356721896433 43.1285530830761, 141.356999693691 43.1288163027196, 141.356194764619 43.1292531731729, 141.355422966253 43.1296822072762, 141.354957036005 43.1299557363642, 141.354596711245 43.1301508980956, 141.354566049532 43.1298629469956, 141.354545176109 43.1291797599342, 141.35450546914 43.128385448706, 141.355056035007 43.1283654804194, 141.355130747802 43.1283448237616, 141.355269128604 43.1282708631429, 141.355621273391 43.1280825266181, 141.355998769858 43.1278806025203, 141.356442514413 43.1282932974082, 141.356721896433 43.1285530830761)) ^^http://www.opengis.net/ont/geosparql#wktLiteral