Wendi,<br>You need to run those two define commands at the top of my previous email before attempting to define the xdist and ydist fields. Also, since I can see your control file information, I can see that dlon is 0.004492369 and dlat is 0.004522556. So substitute those two values into your expressions for xdist and ydist also.<br>
<br>Jeff<br><br><div class="gmail_quote">On Fri, Feb 1, 2013 at 4:36 AM, wendi harjupa <span dir="ltr"><<a href="mailto:wendiharjupa@gmail.com" target="_blank">wendiharjupa@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear Mr. Jeff<div><br></div><div>I have tried to use the scipt which you suggested,</div><div>But, still I could not do it. Would you help me more...</div><div><br></div><div>here I send my gs file :</div><div><br></div><div>
<div>'reinit'</div><div>'open try2.ctl'</div><div>'set grads off'</div><div>'set mproj latlon'</div><div>'set mpdset hires'</div><div>'set gxout shaded'</div><div>'set grid on'</div>
<div>'set lon 100 101'</div><div>'set lat 0 1'</div><div>'define xdist = [(lon 99.7)/dlon]*[dx/2]'</div><div>'define ydist = [(lat -1.02)/dlat]*[dy/2]'</div><div>'set z 5'</div><div>
'set t 1'</div><div>'d ref'</div><div><br></div><div>Below is my ctl file :</div><div><br></div><div><div>DSET 1013.dat</div><div>TITLE RADAR</div><div>OPTIONS TEMPLATE LITTLE_ENDIAN</div><div>UNDEF -1000</div>
<div>XDEF 321 LINEAR 99.688120996 0.004492369</div><div>YDEF 321 LINEAR -1.083708891 0.004522556</div><div>ZDEF 39 LINEAR 1.0 0.5</div><div>TDEF 15 LINEAR 13:00Z10apr2004 4mn </div><div>VARS 2</div>
<div>ref 39 99 Reflectivity(dBZ)</div><div>vel 39 99 Doppler Velocity(m/s)</div><div>ENDVARS</div></div><div><br></div><div><br></div><div>Would you check my gs file, is there something that I have to revise??</div><div>
<br></div><div>Thank you very much.</div><div><br></div><div>Best regards,</div><div>wendi</div><div><br></div><div><br></div><br><div class="gmail_quote"><div class="im">On Fri, Feb 1, 2013 at 10:34 AM, Jeff Duda <span dir="ltr"><<a href="mailto:jeffduda319@gmail.com" target="_blank">jeffduda319@gmail.com</a>></span> wrote:<br>
</div><div><div class="h5"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">These commands will help.<br><br>'define dx = 6.371e3*cos(lat*(3.14159/180))*cdiff(lon,x)*(3.14159/180)'<br>
'define dy = 6.371e3*cdiff(lat,y)*(3.14159/180))'<br>
<br>They define grid increments in terms of spatial distance rather than geographic distance. If you're trying to change the axes and tick marks, you'll have to define an origin and define your x and y distances based on that. For instance, if you set your lower left domain corner (latitude 0 and longitude 100), then you can define your coordinate distances using<br>
<br>'define xdist = [(lon-100)/dlon]*[dx/2]'<br>'define ydist = [(lat-0)/dlat]*[dy/2]'<div><br></div><div>I think this should work, but I haven't tested it myself, so I don't know. dlon and dlat are the step values from the XDEF and YDEF lines of the control file, respectively.</div>
<div><br></div><div>Jeff Duda</div><div><br><div class="gmail_quote"><div><div>On Thu, Jan 31, 2013 at 7:02 AM, wendi harjupa <span dir="ltr"><<a href="mailto:wendiharjupa@gmail.com" target="_blank">wendiharjupa@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>Dear Sir/Madam<div><br></div><div>I need help</div><div>I have problem with grads command,</div>
<div>I am not well understand with command gr2XY,</div>
<div><br></div><div>Actually I want to convert the lon 100 to 101, and lat 0 to 1 to distance (km)</div>
<div>let think that lon 100 is 0 km, and lat 0 is 0 km,</div><div><br></div><div>what command I can use to convert lon and lat to km?</div><div><br></div><div>Thank you very much for your help<br clear="all"><div><br></div>
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<br></blockquote></div><span><font color="#888888"><br><br clear="all"><br>-- <br>Jeff Duda<br>Graduate research assistant<br>University of Oklahoma School of Meteorology<br>Center for Analysis and Prediction of Storms<br>
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<br></blockquote></div></div></div><div><div class="h5"><br><br clear="all"><div><br></div>-- <br><span style="font-size:16px;font-family:arial,helvetica,sans-serif">-------------</span><br style="font-size:16px;font-family:arial,helvetica,sans-serif">
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<div><font color="#333333" face="arial, sans-serif" size="3">email : <a href="mailto:wendi@rslab.riko.shimane-u.ac.jp" target="_blank">wendi@rslab.riko.shimane-u.ac.jp</a></font></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Jeff Duda<br>Graduate research assistant<br>University of Oklahoma School of Meteorology<br>Center for Analysis and Prediction of Storms<br>