GCP Editor Pro and GCP with NAD83

I’ve been using GCP Editor Pro for GCP’s and was having GCP Error around 0.3m. It didn’t make sense to me since I was using good survey quality ground control. What I eventually discovered is that I had measured my GCP in UTM 14N NAD83 and should have converted my Lats/Longs to WGS84. I actually converted to WGS84 and then converted to UTM 14N coords and used the corresponding EPSG (32614) in GCP Editor. Error down to 0.011m.

Also, a quick tip for finding images with your GCP’s. I run a fast ortho and then turn the cameras on in the viewer. It’s a lot faster for me than browsing through 1000 images to find a small X.

It would be better if the Editor could help ID GCP images with the EXIF data but it’s not a huge inconvenience. I appreciate the work put into it as it works great!


Thanks for sharing the tips!

The auto-ID feature is definitely on our radar. (Now we just have to find some time to implement it).


Just wanted to say I really appreciate “The Missing Guide”. It really helped fill in some gaps for me. Thanks!


Ah datums. Le sigh. Glad you figured it out.

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.