All,
I am using ArcMap 10.4.1.
I see many engineers using MSL, but I believe, should be using NAVD88 as a vertical datum. I imagine there must be a rule of how many miles upland (distance from gauge) the sea level gauge is good for. Does anyone know how far upland one can make use of Mean Sea Level accurately, before having to switch to NAVD88 or similar?
I don't know if I would rely on mean sea level at all if you are looking at it as a reference point for upstream reference points... given the 40-50 foot tides in the Bay of Fundy NB/NS in Canada.
What exactly do you want to use msl as a reference point for?