メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.441893339628 43.1271033226459, 141.443222567337 43.1271919812086, 141.443183036283 43.1275765408666, 141.443131122157 43.1280812035819, 141.44178910766 43.1279957606121, 141.440429203312 43.1279091900144, 141.440523544895 43.1274036320935, 141.440595678602 43.1270167716495, 141.441296939456 43.1270635147629, 141.441893339628 43.1271033226459)) ^^http://www.opengis.net/ont/geosparql#wktLiteral