Horizontal/Geometric Datums by Dave Doyle
1:08:24
Vertical Datums by Dave Doyle
51:51
Geodetic Surfaces and Datums
1:01:24
2022 Datum Change
21:59
surveying with Geoid Models
5:31
Best Practices for Minimizing Errors during GNSS Data Collection
1:01:34
2022 NGS Datum by David Newcomer
9:43
GIS Coordinate Reference Systems
4:59