<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>You must have already drawn a plot of something in order to set up the scaling environment for converting world to xy coordinates. Then use these commands</div><div><br></div><div><br></div><div>ga-> q w2xy 120.6 8.3</div><div>X = 8.19231 Y = 2.36538</div><div>ga-> q w2xy 119.3 9</div><div>X = 2.35897 Y = 6.13462</div><div>ga-> draw line 8.19231 2.36538 2.35897 6.13462</div><div><br></div><div><br></div><div>The args to draw line are the results returned by the two 'q w2xy' commands. </div><div>--Jennifer</div><div><br></div><div><br></div><div><br></div><div><br></div><div><div>On Aug 9, 2012, at 1:58 PM, T. haghroosta wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div class="hmmessage" style="font-size: 10pt; font-family: Tahoma; "><div dir="ltr">Dear Jennifer,<br> <br>I did it but it didn't work. Maybe I didn't do that correctly. Could you please explain more. As an example here is my work : I would like to show points (8.3 120.6) and (9 119.3) and also the line between them over my maps.<br> <br><table border="0" cellspacing="0" cellpadding="0" width="143" style="width: 107pt; border-collapse: collapse; "><colgroup><col width="79" style="width: 59pt; "><col width="64" style="width: 48pt; "></colgroup><tbody><tr height="20" style="height: 15pt; "><td dir="ltr" class="xl65" height="20" width="79" style="border-bottom-color: windowtext; border-bottom-width: 0.5pt; border-bottom-style: solid; border-left-color: windowtext; border-left-width: 0.5pt; border-left-style: solid; background-color: transparent; width: 59pt; height: 15pt; border-top-color: windowtext; border-top-width: 0.5pt; border-top-style: solid; border-right-color: windowtext; border-right-width: 0.5pt; border-right-style: solid; "><font face="Arial">Latitude</font></td><td dir="ltr" class="xl65" width="64" style="border-bottom-color: windowtext; border-bottom-width: 0.5pt; border-bottom-style: solid; border-left-color: windowtext; border-left-width: initial; border-left-style: initial; background-color: transparent; width: 48pt; border-top-color: windowtext; border-top-width: 0.5pt; border-top-style: solid; border-right-color: windowtext; border-right-width: 0.5pt; border-right-style: solid; "><font face="Arial">longitude</font></td></tr><tr height="20" style="height: 15pt; "><td dir="ltr" class="xl65" height="20" width="79" style="border-bottom-color: windowtext; border-bottom-width: 0.5pt; border-bottom-style: solid; border-left-color: windowtext; border-left-width: 0.5pt; border-left-style: solid; background-color: transparent; width: 59pt; height: 15pt; border-top-color: windowtext; border-top-width: initial; border-top-style: initial; border-right-color: windowtext; border-right-width: 0.5pt; border-right-style: solid; "><font face="Arial">8.3</font></td><td dir="ltr" class="xl65" width="64" style="border-bottom-color: windowtext; border-bottom-width: 0.5pt; border-bottom-style: solid; border-left-color: windowtext; border-left-width: initial; border-left-style: initial; background-color: transparent; width: 48pt; border-top-color: windowtext; border-top-width: initial; border-top-style: initial; border-right-color: windowtext; border-right-width: 0.5pt; border-right-style: solid; "><font face="Arial">120.6</font></td></tr><tr height="20" style="height: 15pt; "><td dir="ltr" class="xl65" height="20" width="79" style="border-bottom-color: windowtext; border-bottom-width: 0.5pt; border-bottom-style: solid; border-left-color: windowtext; border-left-width: 0.5pt; border-left-style: solid; background-color: transparent; width: 59pt; height: 15pt; border-top-color: windowtext; border-top-width: initial; border-top-style: initial; border-right-color: windowtext; border-right-width: 0.5pt; border-right-style: solid; "><font face="Arial">9</font></td><td dir="ltr" class="xl65" width="64" style="border-bottom-color: windowtext; border-bottom-width: 0.5pt; border-bottom-style: solid; border-left-color: windowtext; border-left-width: initial; border-left-style: initial; background-color: transparent; width: 48pt; border-top-color: windowtext; border-top-width: initial; border-top-style: initial; border-right-color: windowtext; border-right-width: 0.5pt; border-right-style: solid; "><font face="Arial">119.3</font></td></tr></tbody></table><br> <br>Regards,<br> <br>Tahereh<br><br> <br><div><div id="SkyDrivePlaceholder"></div>> From:<span class="Apple-converted-space"> </span><a href="mailto:gradsusr-request@gradsusr.org">gradsusr-request@gradsusr.org</a><br>> Subject: gradsusr Digest, Vol 30, Issue 19<br>> To:<span class="Apple-converted-space"> </span><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>> Date: Thu, 9 Aug 2012 12:00:01 -0400<br>><span class="Apple-converted-space"> </span><br>> Send gradsusr mailing list submissions to<br>><span class="Apple-converted-space"> </span><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>><span class="Apple-converted-space"> </span><br>> To subscribe or unsubscribe via the World Wide Web, visit<br>><span class="Apple-converted-space"> </span><a href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a><br>> or, via email, send a message with subject or body 'help' to<br>><span class="Apple-converted-space"> </span><a href="mailto:gradsusr-request@gradsusr.org">gradsusr-request@gradsusr.org</a><br>><span class="Apple-converted-space"> </span><br>> You can reach the person managing the list at<br>><span class="Apple-converted-space"> </span><a href="mailto:gradsusr-owner@gradsusr.org">gradsusr-owner@gradsusr.org</a><br>><span class="Apple-converted-space"> </span><br>> When replying, please edit your Subject line so it is more specific<br>> than "Re: Contents of gradsusr digest..."<br>><span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> Today's Topics:<br>><span class="Apple-converted-space"> </span><br>> 1. Drawing something (line, point,...) over the map (T. haghroosta)<br>> 2. Re: How to calculate the pressure gradient? (Djordje Romanic)<br>> 3. Re: Drawing so! mething (line, point,...) over the map<br>> (Jennifer Adams)<br>><span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> ----------------------------------------------------------------------<br>><span class="Apple-converted-space"> </span><br>> Message: 1<br>> Date: Thu, 9 Aug 2012 06:29:08 +0000<br>> From: "T. haghroosta" <<a href="mailto:haghroosta@hotmail.com">haghroosta@hotmail.com</a>><br>> Subject: [gradsusr] Drawing something (line, point,...) over the map<br>> To: <<a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a>><br>> Message-ID: <<a href="mailto:SNT104-W2403A6A7F39D90ECA64A85DDCC0@phx.gbl">SNT104-W2403A6A7F39D90ECA64A85DDCC0@phx.gbl</a>><br>> Content-Type: text/plain; charset="windows-1256"<br>><span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> Dear All,<br>><span class="Apple-converted-space"> </span><br>> I have to repeat my question, Is it possible to draw a path with specific coordinates? For example I would like to show the position or the track (moving path) of a typhoon on a map. Is it possible to put some points (with specific coordinates) or lines on a map seperate from contours?<br>><span class="Apple-converted-space"> </span><br>> Regards,<br>><span class="Apple-converted-space"> </span><br>> Tahereh<span class="Apple-converted-space"> </span><br>> -------------- next part --------------<br>&g! t; An HTML attachment was scrubbed...<br>> URL:<span class="Apple-converted-space"> </span><a href="http://gradsusr.org/">http://gradsusr.org</a><span class="Apple-converted-space"> </span>/pipermail/gradsusr/attachments/20120809/31e826ca/attachment-0001.html<span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> ------------------------------<br>><span class="Apple-converted-space"> </span><br>> Message: 2<br>> Date: Thu, 9 Aug 2012 08:50:25 +0200<br>> From: Djordje Romanic <<a href="mailto:djordje8@gmail.com">djordje8@gmail.com</a>><br>> Subject: Re: [gradsusr] How to calculate the pressure gradient?<br>> To: GrADS Users Forum <<a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a>><br>> Message-ID:<br>> <<a href="mailto:CACWmqDci6TS4nRbjv=RRU3bvvGPW=Q-zRTmGoNTETK+=k3MsYw@mail.gmail.com">CACWmqDci6TS4nRbjv=RRU3bvvGPW=Q-zRTmGoNTETK+=k3MsYw@mail.gmail.com</a>><br>> Content-Type: text/plain; charset="iso-8859-1"<br>><span class="Apple-converted-space"> </span><br>> Thanks,<br>><span class="Apple-converted-space"> </span><br>> Since I only need the pressure gradient, and not the pressure gradient<br>> force, I should exclude 1/rho. Just one clarification. When I use cdiff<br>> function for pressure (e.g. in LON direction), should I divide it with dx<br>> or 2*dx. I believe that 2*dx would be correct.<br>><span class="Apple-converted-space"> </span><br>> Regards,<br>> Djordje<br>><span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> On Wed, Aug 8, 2012 at 7:08 PM, Jeff Duda <jeffd!<span class="Apple-converted-space"> </span><a href="mailto:uda319@gmail.com">uda319@gmail.com</a>> wrote:<br>><span class="Apple-converted-space"> </span><br>> > The pressure gradient is simply 1/rho * del(p), where del(p) is the<br>> > gradient operator, which can be displayed in Grads using the mathematical<br>> > decomposition of the gradient operator (i.e., derivatives in the x- and<br>> > y-directions). Use cdiff for those derivatives. Note, you'll have to<br>> > define your x- and y- grid spacing values as well. See the examples on the cdiff<br>> > help page <<a href="http://www.iges.org/grads/gadoc/gradfunccdiff.html">http://www.iges.org/grads/gadoc/gradfunccdiff.html</a>> for how to<br>> > do that.<br>> ><br>> > Jeff Duda<br>> ><br>> > On Wed, Aug 8, 2012 at 5:48 AM, Djordje Romanic <<a href="mailto:djordje8@gmail.com">djordje8@gmail.com</a>>wrote:<br>> ><br>> >> Dear Users,<br>> >><br>> >> I have to calculate the pressure gradient in a given area (Southeast<br>> >> Europe) and I have a pressure date at 2.5 x 2.5 degrees (reanalysis data).<br>> >> Does anyon! e know how to calculate it in GrADS and how to show the results<br>> ; >> in the vector form?<br>> >><br>> >> Thanks in advance.<br>> >><br>> >> Regards,<br>> >> Djordje Romanic<br>> >> M.Sc. in Meteorology<br>> >> Cell: +38164 254 3539<br>> >><span class="Apple-converted-space"> </span><a href="http://www.linkedin.com/">www.linkedin.com</a><span class="Apple-converted-space"> </span>(Djordje Romanic profile)<br>> >><br>> >><br>> >> _______________________________________________<br>> >> gradsusr mailing list<br>> >><span class="Apple-converted-space"> </span><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>> >><span class="Apple-converted-space"> </span><a href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a><br>> >><br>> >><br>> ><br>> ><br>> > --<br>> > Jeff Duda<br>> > Graduate research assistant<br>> > University of Oklahoma School of Meteorology<br>> > Center for Analysis and Prediction of Storms<br>> ><br>> ><br>> > _______________________________________________<br>> > gradsusr mailing list<br>> ><span class="Apple-converted-space"> </span><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>> ><span class="Apple-converted-space"> </span><a href="http://gradsusr.org/mailma!">http://gradsusr.org/mailma!</a><span class="Apple-converted-space"> </span>n/listinfo/gradsusr<br>> ><br>> ><br>> -------------- next part --------------<br>> An HTML attachment was scrubbed...<br>> URL:<span class="Apple-converted-space"> </span><a href="http://gradsusr.org/pipermail/gradsusr/attachments/20120809/55f3fca3/attachment-0001.html">http://gradsusr.org/pipermail/gradsusr/attachments/20120809/55f3fca3/attachment-0001.html</a><span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> ------------------------------<br>><span class="Apple-converted-space"> </span><br>> Message: 3<br>> Date: Thu, 9 Aug 2012 06:56:13 -0400<br>> From: Jennifer Adams <<a href="mailto:jma@cola.iges.org">jma@cola.iges.org</a>><br>> Subject: Re: [gradsusr] Drawing something (line, point,...) over the<br>> map<br>> To: GrADS Users Forum <<a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a>><br>> Message-ID: <<a href="mailto:50D53664-74F9-4A5D-9998-DE85D9E72D7A@cola.iges.org">50D53664-74F9-4A5D-9998-DE85D9E72D7A@cola.iges.org</a>><br>> Content-Type: text/plain; charset="us-ascii"<br>><span class="Apple-converted-space"> </span><br>> Yes. Use 'qw2xy' to convert world coordinates to x,y coordinates on the page. Then use 'draw line' to connect the points.<span class="Apple-converted-space"> </span><br>> --Jennifer<br>><span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> On Aug 9, 2012, at 2:29 AM, T. haghroosta wrote:<br>><span class="Apple-converted-space"> </span><br>> > Dear All,<br>> ><span class="Apple-converted-space"> </span><br>> &g! t; I have to repeat my question, Is it possible to draw a path with sp ecific coordinates? For example I would like to show the position or the track (moving path) of a typhoon on a map. Is it possible to put some points (with specific coordinates) or lines on a map seperate from contours?<br>> ><span class="Apple-converted-space"> </span><br>> > Regards,<br>> ><span class="Apple-converted-space"> </span><br>> > Tahereh<br>> > _______________________________________________<br>> > gradsusr mailing list<br>> ><span class="Apple-converted-space"> </span><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>> ><span class="Apple-converted-space"> </span><a href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a><br>><span class="Apple-converted-space"> </span><br>> --<br>> Jennifer M. Adams<br>> IGES/COLA<br>> 4041 Powder Mill Road, Suite 302<br>> Calverton, MD 20705<br>><span class="Apple-converted-space"> </span><a href="mailto:jma@cola.iges.org">jma@cola.iges.org</a><br>><span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> -------------- next part --------------<br>> An HTML attachment was scrubbed...<br>> URL:<span class="Apple-converted-space"> </span><a href="http://gradsusr.org/pipermail/gradsusr/attachments/20120809/20c6500c/attachment-0001.html">http://gradsusr.org/pipermail/gradsusr/attachments/20120809/20c6500c/attachment-0001.html</a><span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> ------------------------------<br>><span class="Apple-converted-space"> </span><br>> _______________________________________________<br>> gradsu! sr mailing list<br>><span class="Apple-converted-space"> </span><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>><span class="Apple-converted-space"> </span><a href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a><br>><span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> End of gradsusr Digest, Vol 30, Issue 19<br>> ****************************************<br></div></div>_______________________________________________<br>gradsusr mailing list<br><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br><a href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a><br></div></blockquote></div><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>--</div><div>Jennifer M. Adams</div><div>IGES/COLA</div><div>4041 Powder Mill Road, Suite 302</div><div>Calverton, MD 20705</div><div><a href="mailto:jma@cola.iges.org">jma@cola.iges.org</a></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span></span></span>
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