Ellipsoidal height vs elevation?

[michaelL (Michael Lambert)]

Here’s an old thread with a good amount of discussion on what it all means and how it is applied to different use cases.

Orthometric Heights

I am trying to get more surveying use out (initially setting GCP’s) of my Emlid solutions and have had a specific scenario pop up a few times recently that I am trying to work around. We started using our drone to capture topographic information for our pre-bid services and at that stage we have very little or no information to come off of. Because of this I have had to do localizations to keep my surveys on the same basis as the information we have been provided by the surveyors/engineers. I h…