<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi, Tess --<div>You can create a dummy descriptor file that defines any grid you'd like to interpolate to like this: </div><div><br></div><div>dset ^this.file.does.not.need.to.exist.if.you.use.options.template</div><div>options template </div><div>title dummy descriptor to describe grid for use with oacres function</div><div>undef 1</div><div>xdef <put your desired grid specs here></div><div>ydef <put your desired grid specs here></div><div>zdef 1 linear 1 1</div><div>tdef 1 linear 1jan0001 1dy</div><div>vars 1 </div><div>foo 0 99 bar</div><div>endvars</div><div><br></div><div><br><div><div>On Mar 15, 2009, at 8:18 PM, Tess Parker wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>List - I would appreciate some help on the oacres Cressman function. I have<br>station data which I can plot successfully; I don't quite understand the<br>format of the gridded file which this function needs though. Could someone<br>help me out? I'm assuming you need a .ctl file for the gridded data too, and<br>I see from other posts that the grid .ctl file should be accessed before the<br>station .ctl file; but I have no idea how to go about setting up the gridded<br>data file. 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></body></html>