<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Brian Doty has solved this problem with a C program that creates a 'filt' variable for the surface metars. The code does the following: </div><div>1) Assigns priorities to each report that are based on a combination of the number of variables available and the intensity of precipitation</div><div>2) Filters out observations at a particular radius: first pass based on priority, subsequent passes based on proximity to other obs. </div><div>3) All the obs are then written out with an extra data variable, called 'filt', that you can use when drawing. The filt variable ranges between 1 and 6. </div><div><br></div><div>For example, </div><div>'open <a href="http://monsoondata.org:9090/dods/stn/metar/past48'">http://monsoondata.org:9090/dods/stn/metar/past48'</a></div><div><div>'set gxout stnmark'</div><div>'set lat 25 50'</div><div>'set lon -125 -65'</div><div>'d maskout(ts,filt-4)' ;* draws fewer obs</div><div>'d maskout(ts,filt-2); ;* draws more obs</div><div><br></div><div>We use Brian's code operationally at COLA (for the real time metars behind our GDS) but cannot support it beyond that. Please write to me offline if you would like a copy.</div><div>--Jennifer</div><div><br></div><div><div>On Jan 19, 2011, at 10:39 AM, Joralf Quist wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Dear Grads Users,<br><br>I'm currently working with some station data. I would like to skip a number of stations, because they are too close to each other. The numbers overlap and the plot is now pretty much unreadable. I was unable to find any suggestions on how to do this. Hopefully someone here can send me in the right direction.<br><br>Thanks a lot!<br><br>Joralf<br>_______________________________________________<br>gradsusr mailing list<br><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>http://gradsusr.org/mailman/listinfo/gradsusr<br></div></blockquote></div><br><div apple-content-edited="true"> <div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; font-size: 12px; "><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> </div><br></div></body></html>