Expand description
Altitude
This module provides:
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Altitude As Above Ground Level (AGL)
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Altitude As Mean Sea Level (MSL)
See below for:
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Altitude v. Elevation.
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Above Ground Level (AGL) v. Mean Sea Level (MSL)
Examples here are about an aircraft and airport:
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Aircraft takeoff altitude is up to 300 metres above ground level.
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Aircraft cruising altitude is up to 13000 metres mean sea level.
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Airport tower elevation is 90 metres above ground level.
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Airport runway elevation is 1635 metres mean sea level.
Altitude As Above Ground Level (AGL)
Example:
let takeoff = AltitudeAsAboveGroundLevelAsMetreAsStructI32(300);Altitude As Mean Sea Level (MSL)
Example:
let cruising = AltitudeAsMeanSeaLevelAsMetreAsStructI32(13000);Altitude v. Elevation
Altitude and elevation are similar concepts: they both measure the height of something relative to a reference datum (such as the earth’s surface).
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Altitude typically is for the distance between a moving object (such as an aircraft) and a well-known reference datum (such as ground level or sea level). For example, an aircraft takeoff process goes up to an alititude of 300 metres above ground level (AGL) i.e. above the airport runway, and a typical aircraft cruising process goes up to an alititude of 13000 metres mean sea level (MSL).
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Elevation typically is for the tallness of a stationary object (such as a place) compared to a well-known reference point (such as ground level or seal level). For example, an airport control tower building has an elevation of 80 metres above ground level (AGL), and an airport runway in Denver Colorado has an elevation of 1635 metres mean sea level (MSL).
Above Ground Level (AGL) v. Mean Sea Level (MSL)
Altitude and elevation can use a variety of representations such as:
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Above Ground Level (AGL). This is measured from the local ground level. For example, the Burj Khalifa skyscraper in Dubai is 828 metres tall i.e. the top is 828 metres above ground level.
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Mean Sea Level (MSL). This is measured from a worldwide agreed-upon standard chosen based on an plausible average of the world’s ocean level.