Markus,<br><br>Thanks for the suggestion. I will give those focal lengths a try.<br><br>What do you mean by i.ortho.photo is robust and hope that it converges?<br><br>Shaun<br><br><div class="gmail_quote">On Thu, Apr 10, 2008 at 12:33 PM, Markus Neteler <<a href="mailto:neteler@osgeo.org">neteler@osgeo.org</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">On Thu, Apr 10, 2008 at 5:29 PM, Shaun & Melissa Busler<br>
<<a href="mailto:buslers@gmail.com">buslers@gmail.com</a>> wrote:<br>
> Unfortunately, the focal length of the camera is not on the photo border.<br>
> The photo must be too old. Do you have any recommendations on what focal<br>
> length I should try? It was taken in 1939 for the USDA Agricultural<br>
> Adjustment Administration.<br>
<br>
</div>You could try 150mm or 305mm. In fact, i.ortho.photo is quite robust,<br>
just try and hope that it converges.<br>
<br>
(and/or: Maybe someone on the PROJ4 list knows.)<br>
<font color="#888888"><br>
Markus<br>
</font></blockquote></div><br>