<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000'>Hi Alex,<div><br></div><div>You don't need to use PDEF for a Mercator projection, since the grid spacing varies only in latitude. Just make sure you specify the correct latitude values in your YDEF line.</div><div><br></div><div>Best regards,<br><br><div><span name="x"></span>Eric L. Altshuler<br>Research Scientist<br>Center for Ocean-Land-Atmosphere Studies<br>4041 Powder Mill Road, Suite 302<br>Calverton, MD 20705-3106<br>USA<br><br>E-mail: ela@cola.iges.org<br>Phone: (301) 902-1257<br>Fax: (301) 595-9793<span name="x"></span><br></div><br><hr id="zwchr"><b>From: </b>"Alex Gibbs - NOAA Federal" <alex.gibbs@noaa.gov><br><b>To: </b>gradsusr@gradsusr.org<br><b>Sent: </b>Monday, April 8, 2013 10:54:29 AM<br><b>Subject: </b>[gradsusr] PDEF - Mercator to LatLon<br><br><div dir="ltr"><div><div>GrADS Users,<br><br></div>I need a PDEF file that will interpolate a Mercator grid to a LatLon grid. Does anyone know if this has been done or available somewhere?<br><br></div>Thanks,<br>Alex<br></div>
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