Here is some further analysis. After creating demhandler, i created an
ossimPleiadesModel and opened the image so that the keywordlist is loaded. I
tried couple of image points such as (0,0) with lineSampletoWorld and obtained
exactly the same coordinates as rectification. That means, rectification is
using this method deep inside. In the end, intersectRay is finding the position
and it is an iterative method. The question is, why orfeo is finding a
different coordinate than erdas. Any idea is much welcome.
All the best
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