<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi,<br><br>I have gridded data in rotated mercator projection in netcdf file. I want to project the data in lat/long grid using grads. I have tried using data descriptor file setting <br><pre>pdef isize jsize eta.u lonref latref dlon dlat <br>option. But when I plot the map ovarlay. There is some shift.<br></pre>I am using Grads v2.0.a3 in linux mechine. I have attached the output of<br>ncdump below:<br><br>I will highly appreciate any help.<br><br>Jagadish<br></td></tr></table><br>