It is a matter of distortion rather than resolution.
What you need is "rectification" or "orthorectification".
I suppose the first one is on 2D(x, y ) basis and the second is on 3D(x,y,z).
More or less Every aerial photo is distorted.
So you have to rectify it with some software.
I am using a 2D tool, Rastools made in Tennessee, USA.
It works fine when I digitize eroding shorelines of time series aerial photos.
It is not free but please check the site below.
http://home.earthlink.net/~maptools/
Regards,
Hiko
Kazuhiko Yamashita
Fukuoka, Japan
I have some aerial photos from different time periods that I would like to
register acurately in MapInfo - acurately enough so that I can digitise
river channels over it and look at the change in extent of the channel. However when you zoom in on a black and white aerial photo the boundaries
that you would like to use as points to register are way too fuzzy to do it
accurately. I set the dpi so that the file is about 1-1.6MB, jpeg/gif image. (I am soon to have access to a computer with 36 GB, 256MB of RAM, Pentium
4).
Does anyone know how this is usually done? (without buying extraordinarily
expensive software)
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