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Author Topic: Manual alignment - how?  (Read 1411 times)

rossnixon

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Manual alignment - how?
« on: October 29, 2019, 05:04:12 AM »
Could I have a step-by step procedure for manual alignment please?

Most of my (aerial) photos have aligned.
I have placed 3 points on one unaligned photo. Then placed the same points on the next unaligned photo. I select these two photos, reset and align selected photos. Nothing shows in the aligned column. What else do I need to do?

James

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Re: Manual alignment - how?
« Reply #1 on: October 30, 2019, 03:33:18 PM »
You need to place 4 points on a single unaligned photo, and then those same 4 points on 2 aligned photos, then right click the unaligned photo and click 'align selected photos'.

If you can't find 2 aligned photos with those 4 points then either choose 4 different points or you don't have enough overlap to align your unaligned image.

rossnixon

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Re: Manual alignment - how?
« Reply #2 on: October 31, 2019, 04:50:49 AM »
Have tried that with 3,4,5, & 6 points selected on one aligned photo and the next (non-aligned) photo. No luck. Perhaps it is because this pair only has about a 40% overlap. I will resort to some single-photo orthorectifications (in another program) to finish this job.

Dieter

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Re: Manual alignment - how?
« Reply #3 on: October 31, 2019, 10:07:33 AM »
You need the Points on two aligned Photos. With only one Phote you get no Coordinates.