メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.448490265961 43.0511742369704, 141.448628350731 43.0516132949707, 141.448772048921 43.0520338239515, 141.450773288791 43.0516901180271, 141.450333264103 43.0523023680973, 141.447194700326 43.0528493650144, 141.447021111803 43.0523388814967, 141.447038173888 43.0523359071399, 141.446890587563 43.0519201313301, 141.446743372457 43.0514798122631, 141.446612659571 43.0510427741592, 141.448349300561 43.0507391683363, 141.448490265961 43.0511742369704)) ^^http://www.opengis.net/ont/geosparql#wktLiteral