Hi, There is a typo error in http://www.gdal.org/frmt_various.html#PNG "Georeferencing .wld files are written if option WORLFFILE setted. All pixel types other than 16bit unsigned will be written as eight bit." WORLFFILE -> WORLDFILE Regards, Y. -- Yves Jacolin ------------- http://yjacolin.gloobe.org http://softlibre.gloobe.org