メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.377263540866 42.9857711390382, 144.376257594845 42.9855944192778, 144.375539230817 42.9854682522661, 144.375732115517 42.9848727895307, 144.377458550834 42.9851710632889, 144.377263540866 42.9857711390382)) ^^http://www.opengis.net/ont/geosparql#wktLiteral