hypsography

n. branch of geography that deals with the mapping and measurement of high places

Hypsography studies the distribution of elevations on the surface of the Earth, and is sometimes applied to other rocky planets such as Mars or Venus. The term originates from the Greek word "hypsos" meaning height. Most often it is used only in reference to elevation of land but a complete description of Earth's solid surface requires a description of the seafloor as well. Related to the term hypsometry, the measurement of these elevations of a planet's solid surface are taken relative to mean datum, except for Earth which is usually taken relative to the mean sea level.
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Noun
1. the scientific study of the earth's configuration above sea level (emphasizing the measurement of land altitudes relative to sea level)
(hypernym) geology
2. measurement of the elevation of land above sea level
(synonym) hypsometry
(hypernym) measurement, measuring, measure, mensuration

Topography referred to the national geodetic vertical datum of 1929. The science or art of describing heights of land surfaces with reference to this datum.

hypsography /hip'sɔgrəfi/
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