You're seeing that because the model grid itself has certain projection. It has nothing to do with how Grads is interpreting the data. This is a WRF thing. It doesn't look like a Lambert Conformal Conic projection, however, because I think if you do "set mproj lambert", your data should appear to be a rectangle with parallel edges and the map behind it should be altered. Your second figure does not show that, so perhaps you have some other projection. I am also a WRF user, but I use the ARWpost program to convert WRF netCDF files to something Grads can read. Since I don't use the wrf2grads program, there could be something with that program that caused the PDEF line in your control file to be something other than it is in the model. <br>
<br>Jeff Duda<br><br><div class="gmail_quote">On Tue, Feb 8, 2011 at 10:41 AM, Fu Kai <span dir="ltr"><<a href="mailto:sdfukai@gmail.com">sdfukai@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="gmail_quote">
<div>Dear GrADS Users, </div>
<div> </div>
<div>I am beginner to wrf and GrADS, and want to display the output data of wrf using GrADS, I used the wrf2grads program to get the ctl and dat file which are needed by GrADS. When I tried to plot the data, there seems to be a problem, the figure does not coincide with the lat and lon lines (Fig 1). I thought it was because the case uses a lambert projection, while the default projection used by GrADS seems to be Mercator, so I tried to use "set mproj lambert" in GrADS, but only get a small figure (Fig 2) which also seems not properly. Which command should I use to get a right figure.</div>
<div> </div>
<div>Any suggestion would be greatly appreciated. The CTL file and the figure plotted are below. I'm a new GrADS user, so if this is a newbie problem, I apologize in advance.</div>
<div> </div>
<div>CTL file created by wrf2grads program: </div>
<div> </div>
<div>dset ^wrfout_d01_2000-01-24_12:00:00.dat<br>undef 1.e35<br>pdef 73 60 lcc 28.171 -93.649 1.000 1.000 60. 30. -98.000 30000. 30000.<br>xdef 219 linear -94.6 0.13513513<br>ydef 160 linear 23.6 0.13513513<br>
zdef 27 levels<br> 0.02849<br> 0.09096<br> 0.17899<br> 0.29167<br> 0.43435<br> 0.61657<br> 0.83989<br> 1.17945<br> 1.62939<br> 2.10596<br> 2.60960<br> 3.34814<br> 4.30997<br> 5.27340<br>
6.23490<br> 7.19647<br> 8.16307<br> 9.13477<br> 10.11029<br> 11.10285<br> 12.13382<br> 13.21484<br> 14.34895<br> 15.53801<br> 16.78960<br> 18.11523<br> 19.52641<br>tdef 5 linear 12z24jan2000 1mn<br>
vars 8<br>U 27 0 U Compoment of wind<br>V 27 0 V Component of wind<br>W 27 0 W Component of wind<br>THETA 27 0 Theta<br>TC 27 0 Temperature in C<br>P 27 0 Pressure (HPa)<br>
Z 27 0 Height (m)<br>HGT 0 0 Terrain Height<br>endvars</div>
<div> </div>
<div>Fig. 1. </div>
<div><img src="" title="wrfout_d01_2000-01-24_12_00_00.png" alt="wrfout_d01_2000-01-24_12_00_00.png"></div>
<div> </div>
<div>Fig. 2.</div>
<div><img src="" title="wrfout_d01_2000-01-24_12_00_00lambert.png" alt="wrfout_d01_2000-01-24_12_00_00lambert.png"></div>
<div> </div>
<div>Thanks in advance.</div>
<div> </div><font color="#888888">
<div>Kai Fu</div></font></div><br>
<br>_______________________________________________<br>
gradsusr mailing list<br>
<a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>
<a href="http://gradsusr.org/mailman/listinfo/gradsusr" target="_blank">http://gradsusr.org/mailman/listinfo/gradsusr</a><br>
<br></blockquote></div><br><br clear="all"><br>-- <br>Jeff Duda<br>Iowa State University<br>Meteorology Graduate Student<br>3134 Agronomy Hall<br><a href="http://www.meteor.iastate.edu/~jdduda">www.meteor.iastate.edu/~jdduda</a><br>