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  2. Altitude - Wikipedia

    en.wikipedia.org/wiki/Altitude

    Indicated altitude is the reading on the altimeter when it is set to the local barometric pressure at mean sea level. In UK aviation radiotelephony usage, the vertical distance of a level, a point or an object considered as a point, measured from mean sea level; this is referred to over the radio as altitude.(see QNH) [2]

  3. Geopotential height - Wikipedia

    en.wikipedia.org/wiki/Geopotential_height

    Geopotential height or geopotential altitude is a vertical coordinate referenced to Earth's mean sea level (assumed zero geopotential) that represents the work involved in lifting one unit of mass over one unit of length through a hypothetical space in which the acceleration of gravity is assumed constant. [1]

  4. Hypsometry - Wikipedia

    en.wikipedia.org/wiki/Hypsometry

    Hypsometry (from Ancient Greek ὕψος (húpsos) 'height' and μέτρον (métron) 'measure') [1] [2] is the measurement of the elevation and depth of features of Earth's surface relative to mean sea level. [3] On Earth, the elevations can take on either positive or negative (below sea level) values.

  5. List of places on land with elevations below sea level

    en.wikipedia.org/wiki/List_of_places_on_land...

    This is a list of places on land below mean sea level. Places artificially created such as tunnels, mines, basements, and dug holes, or places under water, or existing temporarily as a result of ebbing of sea tide etc., are not included. Places where seawater and rainwater is pumped away are included.

  6. Glossary of landforms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_landforms

    Mountain – Large natural elevation of the Earth's surface; Mountain pass – Route through a mountain range or over a ridge; Mountain range – Geographic area containing several geologically related mountains; Nunatak – Landform within an ice field or glacier; Proglacial lake – Lake formed by the action of ice

  7. Here Are The All-Time Record Cold Low Temperatures In All 50 ...

    www.aol.com/heres-time-record-cold-low-170000238...

    Rogers Pass, Montana, which holds the record for the coldest temperature in the Lower 48 at 70 degrees below zero, rises to an elevation of 5,610 feet above sea level and is located on the ...

  8. 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.

  9. 3 children abducted from Virginia found 600 miles away in ...

    www.aol.com/amber-alert-issued-3-children...

    The children were waiting for a school bus outside an apartment complex when they were seized in Fishersville. They were later tracked down to Alabama.