メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.352120416294 43.1367266689502, 141.352180502285 43.1369061945836, 141.352296713451 43.137253892928, 141.351746264209 43.1373124543902, 141.351229728084 43.1374027869223, 141.350436608571 43.1376117712122, 141.350231656012 43.1372653443521, 141.350095797062 43.1367124838299, 141.35142761619 43.1363146744072, 141.35193148359 43.1361705114186, 141.352059833676 43.1365482646436, 141.352120416294 43.1367266689502)) ^^http://www.opengis.net/ont/geosparql#wktLiteral