<html><head><title>Re: AW: Re: [Qgis-user] Georeferencer plugin and helmert method</title>
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<span style=" font-family:'Courier New'; font-size: 9pt;">helmert = translation and rotation (as far as I remember)<br>
polynomial 1 = affine, i.e. translation, rotation and scaling<br>
polynomial n = adds curvature, where n defines how much curvature can be allowed<br>
<br>
using polynomial 1 should be rather straighforward, please doublecheck the GCPs, weird results are usually due to them.<br>
<br>
Maxim<br>
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<span style=" font-family:'arial'; font-size: 8pt; color: #c0c0c0;"><i>Вы писали 21 сентября 2009 г., 10:39:41:<br>
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<td width=609><span style=" font-family:'arial'; font-size: 10pt;">Hi Maxim<br>
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<span style=" font-family:'arial'; font-size: 10pt;">I wanted to use the helmert method because I know what helmert is doing (or at least I think I know it :-)). Is there any information about polynomial 1,2,3? I used polynomial 1 and I get strange results (but I have to check also my GCPs)<br>
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<span style=" font-family:'arial'; font-size: 10pt;">Stefan<br>
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<span style=" font-family:'arial'; font-size: 10pt;">> -----Ursprüngliche Nachricht-----<br>
> Von: Maxim Dubinin [mailto:sim@gis-lab.info]<br>
> Gesendet am: Montag, 21. September 2009 17:28<br>
> An: Ziegler Stefan<br>
> Betreff: Re: [Qgis-user] Georeferencer plugin and helmert method<br>
> <br>
> Hi Stefan,<br>
> <br>
> Are you sure you need it? Please try polynomials, they are <br>
> much better.<br>
> <br>
> Helmert transformation is a leftover from long time before <br>
> and need to be removed from Georeferencer.<br>
> <br>
> Maxim<br>
> <br>
> ?? ?????? 21 ???????? 2009 ?., 3:58:00:<br>
> <br>
> ZS> Hi<br>
> <br>
> ZS> I'm trying to use the helmert transform method in the<br>
> ZS> georeferencer plugin. QGIS (code revision 11761) crashes after<br>
> ZS> hitting the ok button of the "A Helmert transform requires ...."<br>
> ZS> message box. All the other methods are working. <br>
> ZS> Is anybody using the helmert method with success? <br>
> <br>
> ZS> regards<br>
> ZS> Stefan<br>
> <br>
> <br>
> ZS> _______________________________________________<br>
> ZS> Qgis-user mailing list<br>
> ZS> Qgis-user@lists.osgeo.org<br>
> ZS> http://lists.osgeo.org/mailman/listinfo/qgis-user<br>
> <br>
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