メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.925982437294 43.5874318760409, 141.923471844858 43.5880529152032, 141.92320290081 43.5881313719857, 141.922716317339 43.5871500953313, 141.922590358137 43.5868405107036, 141.924493977477 43.5863569514984, 141.925361904594 43.5861390808637, 141.92551449616 43.5864409997126, 141.925982437294 43.5874318760409)) ^^http://www.opengis.net/ont/geosparql#wktLiteral