As given in the table, topographic elevation is the vertical distance above the reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface.
The topographic isolation of a summit is the minimum great-circle distance to a point of equal elevation.
All elevations in this article include an elevation adjustment from the National Geodetic Vertical Datum of 1929 (NGVD 29) to the North American Vertical Datum of 1988 (NAVD 88).
For further information, please see this United States National Geodetic Survey note.
If an elevation or prominence is calculated as a range of values, the arithmetic mean is shown.