Manifold Community Site: Unable to add control points to an image

RE: Unable to add control points to an image

NWVoyageur1770 — Wed, 13 Aug 2025 22:23:48 GMT

I am new to manifold and an experienced analyst.

For the life of me, I can not figure out why I cannot add control points to and image and the control points that I add to a drawing will not save!

Any hints to what I am doing wrong?

Thanks

RE: Unable to add control points to an image

oeaulong — Wed, 13 Aug 2025 22:33:04 GMT

Best advice on this is to precisely work through the example from the manual, step by step, reading all the pertinent info. No lie, It can be a tricky workflow with overwriting of the control points easily. Also easy is to make a mistake and not fully select & edit to delete the mistake point number. extra points get added, numbers get out of sequence, etc. Go slowly with a handful of points at a time.

I find best practices are to add a few points to the image, save the Control Points then immediately rename those two layers (points+table) to reflect the unprojected image. Then when adding matching points to the reference map do a ssimilar process to save and rename that component. Things become a little easier if the image is added to the map especially if they are in similar projections.

RE: Unable to add control points to an image

wvayens — Thu, 14 Aug 2025 13:44:05 GMT

THe Manifold Sales channel on YouTube has a couple of videos that are helpful. I usually refer to this one, since I can't seem to intuitively get it right the first time!

https://www.youtube.com/watch?v=XcrdTd6GhQM