hypsometer

hypsometer

(1) An instrument used in determining altitudes of points on the Earth's surface in relation to sea level by determining atmospheric pressure through observation of the boiling point of water at each point. Explorers have made much use of this method for determining the heights or altitudes of mountaintops. (2) A differential barometric altimeter. I.e., a barometric altimeter indicating changes in altitude with respect to a surface of constant pressure. (3) An instrument used in forestry for determining heights of trees. (4) A person who measures elevations or the land, or who constructs maps or models to show elevations of land. This use is rare.

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Industry/Domain: Earth science
Category: Mapping science
Company: American Congress on Surveying & Mapping
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