<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi Group members,<br><br>Could you please help me to solve the problem? <br><b style=""><span style="font-size: 12pt; font-family: "Times New Roman";" lang="EN-US">My grads version: Grads2.0a3 under Window XP 2002</span></b><br><br>Now I am encountering a problem when open a NARR 3hr data. In order to practice, I download the data from NARR daily dataset website. the grib data name as:<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="Word.Document"><meta name="Generator" content="Microsoft Word 11"><meta name="Originator" content="Microsoft Word 11"><link rel="File-List" href="file:///C:%5CDOCUME%7E1%5Cemily%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml"><!--[if gte mso 9]><xml>
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<![endif]--><b style=""><span style="font-size: 12pt; font-family: "Times New Roman";" lang="EN-US"><a href="http://nomads.ncdc.noaa.gov/cgi-bin/ncdc-ui/define-collection.pl?model_sys=narr&model_name=narr-a&grid_name=221" target="_blank"></a> narr-a_221_20090912_0000_000.grd. I just download one variable:hgtpre and one level: 500 hpa level. <br>So I change the ctl file as: ls.ctl<br>==============================<br>dset ^ls.grb<br>index ^ls.idx<br>undef 9.999E+20<br>title Select North American Regional Reanalysis - 3hr time steps<br>*<br>* produced by grib2ctl v0.9.12.5p33h modified by hand v1.0 WNE<br>*<br>dtype grib 221<br>options template<br>pdef 349 277 lcc 1 -145.5 1 1 50 50 -107 32463 32463<br>xdef 1111 linear -250 0.333333<br>ydef 247 linear 8 0.333333<br>tdef 1 linear 00:00Z12sep2009 3hr<br>zdef 1 levels 500 <br>*<br>vars 1<br>HGTprs 1
7,100,0 anl Geopotential height [gpm]<br>ENDVARS<br>==================================<br>And then I use gribmap to create an index file: ls.idx<br>So far every thing is ok. Then I display hgtprs, the imformation shows as :<br>=========<br>ga->d hgtprs<br>Notice: Automatic Grid Interpolation Taking Place <br></span></b><b style=""><span style="font-size: 12pt; font-family: "Times New Roman";" lang="EN-US"> Cannot contour grid - all undefined values. </span></b><br><b style=""><span style="font-size: 12pt; font-family: "Times New Roman";" lang="EN-US">==================<br> Thanks in advance.<br><br>Regards<br><br></span></b><b style=""><span style="font-size: 12pt; font-family: "Times New Roman";" lang="EN-US"><!--[if !supportLineBreakNewLine]--></span></b>Emily<br>
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