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  2. Height above mean sea level - Wikipedia

    en.wikipedia.org/wiki/Height_above_mean_sea_level

    Height above mean sea level is a measure of a location's vertical distance (height, elevation or altitude) in reference to a vertical datum based on a historic mean sea level. In geodesy, it is formalized as orthometric height. The zero level varies in different countries due to different reference points and historic measurement periods.

  3. List of countries by average elevation - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    This is a list of countries and territories by their average elevation above sea level based on the data published by Central Intelligence Agency, [1] unless another source is cited. The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1.

  4. Sea level - Wikipedia

    en.wikipedia.org/wiki/Sea_level

    In Hong Kong, "mPD" is a surveying term meaning "metres above Principal Datum" and refers to height of 0.146 m (5.7 in) above chart datum [8] and 1.304 m (4 ft 3.3 in) below the average sea level. In France, the Marégraphe in Marseilles measures continuously the sea level since 1883 and offers the longest collated data about the sea level.

  5. List of elevation extremes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_elevation_extremes...

    sea level 406 m 1,332 ft Guatemala: Volcán Tajumulco [t] 4203 m 13,789 ft North Pacific Ocean Caribbean Sea: sea level 4220 m 13,845 ft Guernsey: Le Moulin: 114 m 374 ft English Channel: sea level 114 m 374 ft Guinea: Mont Nimba (Mount Richard-Molard) 1752 m 5,748 ft North Atlantic Ocean: sea level 1752 m 5,748 ft Guinea-Bissau: Monte Torin: 262 m

  6. List of highest large cities - Wikipedia

    en.wikipedia.org/wiki/List_of_highest_large_cities

    This list of the highest cities in the world includes only cities with a population greater than 100,000 inhabitants and an average height above sea level over 2,000 metres (6,600 ft). This list is incomplete ; you can help by adding missing items .

  7. List of U.S. states and territories by elevation - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._states_and...

    Enlargeable map of the 50 U.S. states by mean elevation. This list includes the topographic elevations of each of the 50 U.S. states, ... sea level: NA 57 280 ft

  8. List of mountain peaks of the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_mountain_peaks_of...

    The topographic elevation of a summit measures the height of the tip of a mountain above a geodetic sea level. [b] [c] The first table below ranks the 100 highest major summits of the United States by elevation. The topographic prominence of a summit is a measure of how high the summit rises above its surroundings.

  9. Orthometric height - Wikipedia

    en.wikipedia.org/wiki/Orthometric_height

    The orthometric height (symbol H) is the vertical distance along the plumb line from a point of interest to a reference surface known as the geoid, the vertical datum that approximates mean sea level. [1] [2] Orthometric height is one of the scientific formalizations of a layman's "height above sea level", along with other types of heights in ...