Correcting Georeference Imges

[ralph058]

Hi
When I incorrectly enter data when georeferencing an image, I can tell right away because the image is distortion. I can't see how to fix it without clearing out the image and reloading and re referencing.

Is there a way to correct the georeference points in an image?

Thanks
Ralph

[global_flyer]

When you rectify your imagery the first time, be sure to save your control points to a file. That way, if you need to modify the rectification it will be able to load the points. You can then select

File - Rectify (Georeference) Imagery.

Load the same file (again) and you'll be able to modify your points.

Try it out and let me know if it works for you.

[global_mapper]

Actually the easiest thing to do is just open the Control Center, right-click on the layer, then select the option to modify the layer position. This will bring the rectification dialog back up for the layer, allowing you to modify the existing control points and add new ones.

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com

[Matt]

Another thing I've found helpful when I make a really bad mistake with rectification. If you uncheck the layer (making it not visible), then re-rectify, you will see the original, undistorted, image when you use the rectification tool again and you can delete the bad point.

Matt

[ralph058]

Hi
First, as Murphy would have it, I did it correctly a number of times before I finally decided to deliberately do a bad one.

Yes, both hints work. I found Mike's latter comment a while ago by accident.