hi, gradsuser, Does anybody has an idea to deal with the curvilinear data in grads? Do I need list all long/lat in ctl file? or interpolate outside grads before grads? Thanks for any help. Dawn -------------- next part -------------- An HTML attachment was scrubbed... URL: http://gradsusr.org/pipermail/gradsusr/attachments/20110317/c9e5d65e/attachment-0003.html