<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi, Tess -- <div>The basemap.gs script is drawing a lot of polygons that fit exactly inside (or outside) the continental outlines. The database of polygon coordinates was generated by running another script manually -- it was a painstaking process that required the effort of several summer interns. Unfortunately, some of the polygons in the database cross over latitude circles and this spoils the look of some circular polar stereographic plots because these polygons do not get clipped. There are a couple of options: </div><div>1. Try changing your latitude limits -- maybe there are no polygons crossing the 65N line...</div><div>2. Use low resolution instead of medium -- I think these polygons are better behaved<br><div>3. (Best option, I think) Change your lat range to 50 90, but then use 'set mpvals 0 360 70 90' to zoom into the area of interest -- this will result in a square plot instead of a circular one, but basemap will work properly. You can rotate the plot by changing the min/max lon values in the 'set mpvals' command. </div><div><br></div><div>Jennifer</div><div><br></div><div><br><div><div>On Mar 15, 2009, at 9:05 PM, Tess Parker wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>List - I am using the script basemap.gs to produce a north pole<br>stereographic map with land areas shaded grey. I am using medium resolution.<br>My grads commands are:<br><br>'open avestn.ctl'<br>'enable print 'test_ave.gmf'<br>'set grads off'<br>'set mproj nps'<br>'set lon 0 360'<br>'set lat 70 90'<br>'set digsize 0.09'<br>'set dignum 1'<br>'set stid on'<br>'set stnprint on'<br>'set mpdset mres'<br>'set map 1 1 3'<br>'d press'<br>'basemap L 15 0 M'<br>'draw title Monthly Mean SLP'<br>'print'<br>'disable print'<br><br>The problem I have is that there are a couple of shaded areas which extend<br>outside my map; do I need to use another command such as mpvals or something<br>to get rid of these? There are three biggish blocks of grey outside the 60<br>lat circle. Any help much appreciated.<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; "><div style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><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></div></span> </div><br></div></div></body></html>