メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.407434040866 43.7555102361725, 142.407480840154 43.7559122538299, 142.405133410001 43.7560467228008, 142.403414955236 43.7561299058887, 142.403373424382 43.7557573789632, 142.403313190156 43.7551266915519, 142.404646131762 43.7543906334305, 142.404778148404 43.7545811330147, 142.405042422003 43.7550491907428, 142.406077358556 43.7549980623667, 142.406660598962 43.7549682464585, 142.407375338089 43.7549341186829, 142.407416326319 43.7552988380704, 142.407434040866 43.7555102361725)) ^^http://www.opengis.net/ont/geosparql#wktLiteral