メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.772325536516 43.2084504412455, 141.772385655382 43.2084778391351, 141.772897557374 43.2087655734446, 141.772314203841 43.2094183917701, 141.771695303824 43.2091100932764, 141.771357863105 43.2089391938803, 141.772006668005 43.2082963595583, 141.772325536516 43.2084504412455)) ^^http://www.opengis.net/ont/geosparql#wktLiteral