Tag Archives: Epoch
![Site velocities with respect to NAD 83(2011) epoch 2010.00. Credit: National Oceanic and Atmospheric Administration (NOAA).](/wp-content/uploads/2020/03/Screen-Shot-2020-03-26-at-17.13.37-272x192.png)
Datum Epochs, And How to Understand Them
Understanding datum epochs for accurate measurements and locations in dynamic tectonic areas. What are datum epochs? Let’s start at the beginning. “Epoch” is a scientific term used to denote a specific moment or period in time. Land surveying and geodesy use a numerical “epoch” in decimal years to state the moment at which a given...