<html><head><base href="x-msg://8/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Thank you very much. That is indeed the fail safe way to go. For anyone else following this - note that the three steps indicated are run from the xy location not the location where you want the map to end up.<div><br></div><div>Cheers </div><div><br></div><div>Stu</div><div><br></div><div><br><div><div>On Oct 6, 2010, at 2:39 PM, Pablo Carreira wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div class="hmmessage" style="font-size: 10pt; font-family: Tahoma; ">Sometimes I have the same problem.<div><br></div><div>My solution is to use the georectify module to set the GPCs, save, close it and then run:</div><div>i.group - i.target - i.rectfy.</div><div>It's fail safe.<br><br>Pablo Torres Carreira<span class="Apple-converted-space"> </span><br><br><br><br>> From:<span class="Apple-converted-space"> </span><a href="mailto:sedwards2@cinci.rr.com">sedwards2@cinci.rr.com</a><br>> Date: Wed, 6 Oct 2010 09:23:17 -0400<br>> To:<span class="Apple-converted-space"> </span><a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a><br>> Subject: [GRASS-user] help with georectify<br>><span class="Apple-converted-space"> </span><br>> Hi ~<br>><span class="Apple-converted-space"> </span><br>> GRASS 6.4.0 / OS X 10.6.4 and 10.5.8 (PPC) with wxpython<br>><span class="Apple-converted-space"> </span><br>> I'm having a problem with the georectify module - which is strange since I've used it a lot in the past without any problems; although maybe not since I upgraded to this GRASS version - hard to remember. The module executes smoothly through the selection of GCPs and will compute an rms error. However, when the georectify button is activated I get an error message stating that the Group does not exist. Right above this message is a line from i.points stating that the points file was saved for this group -- i.e.<span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> POINTS file </Users/stu/grassdata/xy2/PERMANENT/group/sheet9/POINTS> saved<span class="Apple-converted-space"> </span><br>> (Wed Oct 6 09:03:44 2010)<span class="Apple-converted-space"> </span><br>> i.rectify -a group=sheet9 extension=georect64214 order=1<span class="Apple-converted-space"> </span><br>> ERROR: Group <sheet9> does not exist<br>> (Wed Oct 6 09:03:44 2010) Command finished (0 sec)<span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> This looks a little like a bug that was identified last year and fixed (# 689 / # 709)<br>><span class="Apple-converted-space"> </span><br>> BTW, what is the complex 'extension' and why is the auto-generated value so 'complex'<span class="Apple-converted-space"> </span><br>><span class="Apple-converted-space"> </span><br>> Thanks for any assistance .......<br>><span class="Apple-converted-space"> </span><br>> Stu_______________________________________________<br>> grass-user mailing list<br>><span class="Apple-converted-space"> </span><a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a><br>><span class="Apple-converted-space"> </span><a href="http://lists.osgeo.org/mailman/listinfo/grass-user">http://lists.osgeo.org/mailman/listinfo/grass-user</a><br></div>_______________________________________________<br>grass-user mailing list<br><a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a><br><a href="http://lists.osgeo.org/mailman/listinfo/grass-user">http://lists.osgeo.org/mailman/listinfo/grass-user</a><br></div></span></blockquote></div><br></div></body></html>