|The selected local geodetic
datum is a geopotential surface separated from the global geoid by a bias.
|In this context, LMSL on the
opposite side of the island would be higher than the local geodetic datum.
|Implication is that a storm
surge from that side would run up higher on land than the orthometric heights
|LMSL is very well defined at
tide stations but shoreline observations are necessary to fill in along other
|Also, lidar observations are
necessary to develop a more complete model of MDT (thereby deriving LMSL)
over the transition from near shore to deeper offshore.
|You would get similar
problems if a datum point is established on one island and used for all of