This is a plugin for Antarctic Mapping Tools. Just two simple functions for converting between geoid and ellipsoid elevations. Geoid-referenced elevations are useful if you're working with processes relative to sea level. WGS84-referenced elevations are useful for comparing to common datasets you might find such as IceBridge or ICECAP surface elevations referenced to the WGS84 ellipsoid.
Inspired by: Geodetic Transformations, Geodetic Toolbox, DTED - EGM96 load/display v1.0, Bedmap2 Toolbox for Matlab, geod -- yet another geodetic toolbox, Antarctic Mapping Tools, geographiclib, IBCSO International Bathymetric Chart of the Southern Ocean