メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.132870150487 34.6379007978904, 138.132941955145 34.6381011790969, 138.132900708453 34.6382946004148, 138.132789776775 34.6383779384866, 138.132125603385 34.6384872199066, 138.131917537084 34.6378645446097, 138.132580169148 34.6377463848615, 138.132700933926 34.637780978116, 138.132870150487 34.6379007978904)) ^^http://www.opengis.net/ont/geosparql#wktLiteral