ortho export not project coordinate system

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    Bill Isenberger

    Even though the Ortho Projection Tool indicated the Coordinate system as epsg:32636 - WGS 84 / UTM zone 36N, I open the Coordinate System dialog and scrolled down the list to epsg:32636 - WGS 84 / UTM zone 36N and selected it. When I did the coordinates for Centre updated to proper UTM coordinates. I rendered a new ortho and it exported correctly. This image shows the results of re-selecting the Coordinate system:

    You can see the coordinate read out for the cursor location on the ortho is also correct now.

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    Götz Echtenacher

    So you think it was falsely displayed?

    Sounds like a bug to me...

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    wangsgi

    also meet the same problem. the exported GeoTIFF can't read proper coordinate, anyone can help ? 

    or is this feature still under dev ? 

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    Götz Echtenacher

    That's what the section "Bug reports" is for in my view...  ;-)

    I can't report it because I'm not encountering the problem.

    Even if it turns out it isn't a bug, the response time there is usually shorter!

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    Bill Isenberger

    Here is what I did to get it to work:

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    Bill Isenberger

    When I checked some ortho's, in a different program, with the ground control points overlain. Some of the orthos didn't quite match up. I found that if I reset the coordinate system for the ones where the GCP's didn't match up, and then created a new ortho, SOMETIMES the new ortho will match up.

    *After more testing I found this doesn't always fix the situation.

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    Götz Echtenacher

    Hi Bill,

    could you check if your problem is related to this one:

    https://support.capturingreality.com/hc/en-us/community/posts/115001349652-Bug-3805-Pixel-number-changes-in-orthophoto

    Summary: Orthophotos sometimes get randomly stretched in height.

    It might help to pin down the reason behind it...

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    Bill Isenberger

    Hi Gotz,

    Yes, it appears to be related. I had manually set the pixel size to 0.02 for my orthos. After reading the thread you linked to, I set the pixel size to 0.0199 on the orthos that didn't match up. Changing the pixel size to 0.0199 did the trick. There seems to be some kind of mathematical error related to the orhto pixel size.

    Thanks for posting that link. :)

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    Götz Echtenacher

    Hey Bill,

    glad it solved your problem! Nice side-effect.  :D

    I'm curious that it worked with the odd number though - shouldn't it be the other way round?

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