メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.362794425023 43.0814235676347, 141.363562747269 43.0815177821064, 141.363418965798 43.0820930117803, 141.363371709974 43.0822825336276, 141.363290791796 43.0826504290378, 141.362486774988 43.082548761987, 141.36245430961 43.0825445718743, 141.361606743901 43.082435739278, 141.361734057433 43.0818724805846, 141.361876022206 43.0813110231975, 141.362724986027 43.0814150824401, 141.362794425023 43.0814235676347)) ^^http://www.opengis.net/ont/geosparql#wktLiteral