This looks like a good time for geodetic outreach. Mr. Taylor's excellent presentations are a great addition to share. Just today the Florida Geospatial Users Group (formerly the Florida GNSS Users Group) has posted the first four of a series of 1-hr videos that they supported dealing with the foundational elements of Geodetic Surfaces, Horizontal and Vertical Datums and the upcoming 2022 datum changes. I was the presenter for this initial series and they will be working to create other presentations on various topics in geodesy and GNSS. Please take some time to look at these and make your critical comments. I'll be the first to admit that I made several misstatements - see if you can find them. These are all free and their goal is to try and provide quality education presentations - I am sure that your responses to them will be seriously considered. You can find them at -- https://www.youtube.com/channel/UCG69vYuN1Q61fWKiXffzo9A
Dave: thanks for posting this. We need all the education we can get.
Thanks, Dave, excellent stuff there.
I have always been of the opinion that the Land Surveying geodetic community needs more and better training resources to ensure a proper understanding of the underlying principles and to avoid making bad mistakes.
I also think that we need some resources for the geodetic folks including surveyors to effectively communicate the value of geodesy/geodetic surveys to fellow professionals and to lay people in a straight forward manner. A sort of Geodesy for Dummies.
Thanks .
Usual good stuff.
One suggestion. (Quibble?)
Instead of the usual presentation of the relationship between the three height systems
(h = ellipsoid height; H = orthometric height; and N = distance from the ellipsoid to the geoid)
as H = h - N
consider the more universal h - H - N = 0.
Given any two quantities it is easy to compute the third with this version. In many cases I am comparing the N from the published H and computed h with the model values.
Of course the actual relationship is h - H - N = 0 plus errors in h,H, and N.
Cheers,
DMM
Many surveyors are bona fide flat earthers..... (grin wink)
N
