<div dir="ltr"><div><div><div>Hello Grad users!<br><br></div>I am attempting to open a dataset of northern hemisphere snow cover extent. The dataset runs from 1966 to present at weekly time steps. The original source of the data is <a href="http://climate.rutgers.edu/snowcover/docs.php?target=datareq">http://climate.rutgers.edu/snowcover/docs.php?target=datareq</a>.<br><br></div>The data is not openable via the 'sdfopen' command. The main reason for this is that the data is in a form of a northern polar stereographic projection, but the projection is actually several polar projections overlaid so that the entire northern hemisphere can be displayed (if opened in Panoply or similar viewer this property can be clearly seen). From a paper describing the dataset: "The <div style="font-family:sans-serif"><font size="2">NH SCE CDR maps are based on the National Meteorological Center (NMC) Limited-Area Fine Mesh grid. The NMC grid is an 89 x 89 cell Cartesian grid draped over a polar stereographic projection with cell resolutions ranging from ~10,600 sq. km near the equator to ~41,300 sq. km near the pole" </font></div><br></div>So, I am trying to write a control file that specifies the projection (PDEF) but I'm not even sure that GrADS can handle it. I'm also unsure of how I would define XDEF and YDEF given the PDEF.<br><br>Any suggestions are welcome. <br><div><div><div><br clear="all"><div><div><div><div class="gmail_signature"><div dir="ltr"><div>John Burkhart, Ph.D. Student</div><div>West Virginia University</div><div>Department of Geology & Geography</div><div>cell: (334) 524-5350</div><div>email: <a href="mailto:jburkha4@mix.wvu.edu" target="_blank">jburkha4@mix.wvu.edu</a></div><div>twitter: <a href="https://twitter.com/ParanoidYeti" target="_blank">@ParanoidYeti</a></div><div><br></div><div><br></div></div></div></div>
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