Dear Eric,<br><br>It worked perfectly. Thank you very much for your help.<br>Best regards.<br><br>Hernán<br><br><div class="gmail_quote">2009/6/10 Eric Altshuler <span dir="ltr"><<a href="mailto:ela@cola.iges.org">ela@cola.iges.org</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">You can use the query command to convert from geographic (world) coordinates to screen (virtual page) coordinates. First you need to display something, for example a variable 'var'.<br>
<br>
d var<br>
q w2xy LON LAT<br>
<br>
where (LON,LAT) are the longitude and latitude of the point where you want to draw the mark. The output from the 'q w2xy' command will be of the form:<br>
<br>
X = xpos Y = ypos<br>
<br>
where (xpos,ypos) are the virtual page coordinates of the point with geographic coordinates (LON,LAT). To draw the mark, do:<br>
<br>
draw mark MARKTYPE xpos ypos SIZE<br>
<br>
See <a href="http://grads.iges.org/grads/gadoc/gradcomddrawmark.html" target="_blank">http://grads.iges.org/grads/gadoc/gradcomddrawmark.html</a> for documentation on the 'draw mark' command.<br>
<br>
Best regards,<br>
<br>
Eric L. Altshuler<br>
Assistant Research Scientist<br>
Center for Ocean-Land-Atmosphere Studies<br>
4041 Powder Mill Road, Suite 302<br>
Calverton, MD 20705-3106<br>
USA<br>
<br>
E-mail: <a href="mailto:ela@cola.iges.org">ela@cola.iges.org</a><br>
Phone: (301) 902-1257<br>
Fax: (301) 595-9793<br>
<div><div></div><div class="h5"><br>
----- Original Message -----<br>
From: "hersala" <<a href="mailto:hersala@GMAIL.COM">hersala@GMAIL.COM</a>><br>
To: <a href="mailto:GRADSUSR@LIST.CINECA.IT">GRADSUSR@LIST.CINECA.IT</a><br>
Sent: Wednesday, June 10, 2009 2:34:57 PM GMT -05:00 US/Canada Eastern<br>
Subject: About draw mark command<br>
<br>
Hi Gradsusers,<br>
Has anybody know how to use de *draw mark* command using geographic<br>
coordinates instead of x and y inches (on the virtual page) as it is set as<br>
default ?<br>
Tks in advance !<br>
Hernán<br>
</div></div></blockquote></div><br>