[GRASS-user] Orthorectification of Historic Aerial Photographs

[Shaun & Melissa Busler]

Markus,

Thanks for the suggestion.  I will give those focal lengths a try.

What do you mean by i.ortho.photo is robust and hope that it converges?

Shaun

On Thu, Apr 10, 2008 at 12:33 PM, Markus Neteler <neteler at osgeo.org> wrote:

> On Thu, Apr 10, 2008 at 5:29 PM, Shaun & Melissa Busler
> <buslers at gmail.com> wrote:
> > Unfortunately, the focal length of the camera is not on the photo
> border.
> > The photo must be too old.  Do you have any recommendations on what
> focal
> > length I should try?  It was taken in 1939 for the USDA Agricultural
> > Adjustment Administration.
>
> You could try 150mm or 305mm. In fact, i.ortho.photo is quite robust,
> just try and hope that it converges.
>
> (and/or: Maybe someone on the PROJ4 list knows.)
>
> Markus
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/grass-user/attachments/20080410/b8268831/attachment.html