[GRASS5] i.points and i.rectify question

[Bob Covill]

Hello,

There is a difference between i.rectify (& i.points) and i.rectify3. 
Unfortunately, I have never figured out which one is "more" correct. I 
think that i.rectify3 post dates i.rectify and was intended to replace it??

The i.rectify3 and i.points3 programs both use the image3 library in 
src/libes. This library utilizes the proj library and converts 
coordinates on the fly between lat. long. and the users coordinate 
system. Unfortunately, i.rectify3 is not built by default, but the 
source is still there.

We probably need to decide which set of programs is more up to date (and 
accurate). My preference has been i.points3 and i.rectify3 but I may be 
way off on this.

--
Bob Covill

Michael Barton wrote:
> In versions 5.0.x and 5.3 are the 2 modules i.points and i.points3. The 
> documentation for both versions of GRASS discuss the associated programs 
> i.rectify and i.rectify3. However, there does not seem to be a module 
> i.rectify3 anywhere. Some months back, before I realized that i.rectify3 
> was missing, I tried both i.points and i.points3 and found i.points3 to 
> be a better program in several respects. However, the output file it 
> creates (image xy and georeferenced coordinate pairs) seems to be ONLY 
> in lat long and does not work with i.rectify. This was a major headache.
> 
> Has anyone else run into this? Is there any way to "rectify" this 
> problem? ;-)
> ____________________
> C. Michael Barton, Professor
> Department of Anthropology
> PO Box 872402
> Arizona State University
> Tempe, AZ  85287-2402
> USA
> 
> Phone: 480-965-6262
> Fax: 480-965-7671
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