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Height measured with respect to the underlying ground surface
a height above ground level (AGL or HAGL) is a height measured with respect to the underlying ground surface. This is as opposed to height above mean
Height_above_ground_level
Very low-altitude flight technique
transmission towers, an altitude of 150 m (490 ft) above ground level applies. Height above ground level in NOE and low flying generally vary with the aircraft
Nap-of-the-earth
Reference surface for vertical positions
cited in height above sea level, although what "sea level" actually means is a more complex issue than might at first be thought: the height of the sea
Vertical_datum
Megatall skyscraper in China
120th floor in 2021, became the world's highest luxury hotel by height above ground level. Planning models for the Lujiazui financial district dating back
Shanghai_Tower
Elevation of a location above a standardized 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
Height_above_mean_sea_level
Rate of increase in wind strength per unit increase in height
increase in height above ground level. In metric units, it is often measured in units of speed (meters per second) divided by units of height (kilometers)
Wind_gradient
Measure of vertical distance
level, height is more often called altitude. Furthermore, if the point is attached to the Earth (e.g., a mountain peak), then altitude (height above sea
Height
Position along a vertical direction above or below a given vertical datum
Dynamic height Ellipsoidal height Geocentric altitude Geopotential Height above mean sea level Height above average terrain Height above ground level Measured
Vertical_position
Height of a geographic location above a fixed reference point
location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential
Elevation
Achaemenid tomb at Naqsh-e Rostam, Iran
of Persepolis in Iran. They are all situated at a considerable height above ground-level. One of the tombs is explicitly identified by an accompanying
Tomb_of_Darius_the_Great
Geographical reference point from which various heights are measured
refers to the height above mean sea level (AMSL). The term APSL means above present sea level, comparing sea levels in the past with the level today. Earth's
Sea_level
Distance between pixel centers in remote sensing
geometry is achieved at a 45° off-nadir angle. This corresponds to a height above ground level ( h {\displaystyle h} ) equal to the horizontal distance between
Ground_sample_distance
TV tower in İstanbul, Turkey
(59 ft) below ground. The height of the tower's steel antenna is 168 metres (551 ft). With a total height of 587 metres (1,926 ft) above sea level, it carries
Çamlıca_Tower
1972 aviation accident in Illinois
altitude of 1,040 feet (320 m) MSL corresponded to an actual height above ground level (AGL) of only 429 feet (131 m). When Flight 553 reached the Kedzie
United_Air_Lines_Flight_553
Former building in Ginza, Tokyo
Tawā Biru Maximum height above ground level was 53.5 and 47.4 m (176 and 156 ft) for the 13- and 11-storey towers, respectively. Height, width, and length
Nakagin_Capsule_Tower
Movements in classical dressage
airs above the ground or school jumps are a series of higher-level, Haute école, classical dressage movements in which the horse leaves the ground. They
Airs_above_the_ground
1939 German aviation accident
due to rapidly forming ground fog. This made it nearly impossible to correctly determine the actual height above ground level and to recover from the
1939_Neuhammer_disaster
Turkish unmanned combat aerial vehicle
It can operate in a height above ground level of 400 m (1,300 ft) at a maximum elevation of 2,800 m (9,200 ft) above mean sea level. The drone is dust-resistant
Asisguard_Songar
Topics referred to by the same term
HAGL may refer to: Height above ground level Hoang Anh Gia Lai Group, a Vietnamese company Hoàng Anh Gia Lai F.C., an association football club Humeral
HAGL
Instrument used to determine the height of an object above a certain point
are industry standard. The radar altimeter is used to measure height above ground level during landing in commercial and military aircraft. Radar altimeters
Altimeter
Knoll in England
monument. The barrow is 21m in diameter and stands some 1.5m in height above ground level. In the absence of trees, the barrow would be a prominent landmark
Goffers_Knoll
Constituent gas of the troposphere
kilometers above the Earth's surface. The troposphere extends from the ground up to a variable height of approximately 14 kilometers above sea level. Ozone
Ground-level_ozone
Part of a building
at ground or street level is called the ground floor (i.e. it needs no number); the floor below ground is called basement, and the floor above ground is
Storey
Measures an aircraft's height above the terrain
altimeter. A radar altimeter measures absolute altitude: the height "Above Ground Level" (AGL). As of 2010[update], all commercial radar altimeters use
Radar_altimeter
Standard method of expressing the diameter of the trunk or bole of a standing tree
many countries, DBH is measured at approximately 1.3 m (4.3 ft) above ground. The height can make a substantial difference to the measured diameter. In
Diameter_at_breast_height
2015 aviation accident in Japan
hundred. Five hundred." (RA height EGPWS: "Four hundred. Three hundred. Two hundred." (Actual height (above ground level)) First officer: "Five hundred
Asiana_Airlines_Flight_162
Height based on large area surrounding object; often used in U.S. for antenna towers
Height above average terrain (HAAT), or (less popularly) effective height above average terrain (EHAAT), is the vertical position of an antenna site above
Height_above_average_terrain
Special vehicle to fly in air just above sea or ground
stationary surface below it. Typically, a GEV will glide just above a relatively level surface. Some vehicles can operate over any flat area such as a
Ground-effect_vehicle
Apparent curve that separates earth from sky
{\displaystyle h} is the height of the observer above the surface, e.g., the Earth's orthometric height (height above mean sea level). Assuming no atmospheric
Horizon
Protected area, usually architectural or urban, in the UK
more than 75 mm (3.0 in), when measured at 1.5 metres (4.9 ft) height above ground level, in a conservation area must give the planning authority six weeks'
Conservation area (United Kingdom)
Conservation_area_(United_Kingdom)
Mathematical simulation of how air pollutants disperse in the ambient atmosphere
above) requires the input of H which is the pollutant plume's centerline height above ground level—and H is the sum of Hs (the actual physical height
Atmospheric dispersion modeling
Atmospheric_dispersion_modeling
notable structures, including one high-rise. By floor count and height above ground level, the tallest building is the 18-floor Patterson Office Tower,
List of University of Kentucky buildings
List_of_University_of_Kentucky_buildings
Aviation incident in Norfolk, England
determine the height of the accident from eyewitness accounts. The collision occurred in good visibility at an estimated height above ground level of 300 ft
1974 Norfolk mid-air collision
1974_Norfolk_mid-air_collision
Building in Manhattan, New York
which is numbered as the 88th because of its 880-foot (270 m) height above ground level, is a game room, library, sun room, and dining room. The sun room
520_Fifth_Avenue
Former synagogue in Lviv, Ukraine
III's original permit. The external height above ground level also met the royal specification, though the internal height was effectively increased by lowering
Great_Suburb_Synagogue
point would not add to the height of the tree. On a slope this base point is considered as halfway between the ground level at the upper and lower sides
Tree_height_measurement
The height above ground level is 117 metres. However, if measured from the central plaza of the complex, it reaches 122 metres. The official height is
List of tallest buildings in Peru
List_of_tallest_buildings_in_Peru
Aspect of meteorological history
is the pollutant plume's centerline height above ground level—and H is the sum of Hs (the actual physical height of the pollutant plume's emission source
History of numerical weather prediction
History_of_numerical_weather_prediction
Style of house
living area, which is typically partially above ground level. Below that may be a small crawl space. The lower level is a finished area partially underground
Split-level_home
Laws that restrict the maximum height of structures
were limited to 150 m (490 ft) above ground level due to its proximity to Blatchford Field (City Centre Airport). The height restriction was lifted in 2013
Height_restriction_laws
Radio station in the United States
watt) Antenna Height Above Average Terrain: 5 M HAAT Antenna Height Above Mean Sea Level: 309 M AMSL Antenna Height Above Ground Level: 20 M AGL Campus
KRLX
Building in Shandong University, China
School of Physics. Block D has seven above-ground floors and one below-ground basement level. The total above-ground height of this block is 35.8 metres. Of
Zhixin_Building
bushing elevation (in meters above sea level, or meters above ground level) KBG – kelly bushing height above ground level KBUG – kelly bushing underground
List of abbreviations in oil and gas exploration and production
List_of_abbreviations_in_oil_and_gas_exploration_and_production
Public radio network in Alabama, United States
of WENN-AM 1320, with an effective radiated power of 35 W at a height above ground level of 846 feet. Also, the WQPR signal has a translator (W264AI) that
Alabama_Public_Radio
Surveying technique
surface height with respect to a reference. Optical levelling, also known as spirit levelling and differential levelling, employs an optical level, which
Levelling
Static pressure exerted by the weight of Earth's atmosphere
barometric formula) relates atmospheric pressure p to altitude (height above mean sea level) h: p = p 0 ⋅ ( 1 + L ⋅ h T 0 ) − g ⋅ M R 0 ⋅ L = p 0 ⋅ ( 1 +
Atmospheric_pressure
High-rise building in Reading, England
The 86-metre (282 ft) steel building has 14 floors above ground level; the floor-to-floor height is 3.77 metres (12.4 ft). The building's façade is a
The_Blade,_Reading
U.S. national memorial in Washington, D.C.
east side, above this ground level. Its thickness, 23 feet (7 m), reduces the remaining height of the tower to 535 feet (163 m), its CTBUH height. The tower
Washington_Monument
Radio station owned by Penn State in University Park, Pennsylvania
Power: 100 Watts Height above Avg. Terrain: 26 meters (85 feet) Height above Ground Level: 39 meters (128 feet) Height above Sea Level: 411 meters (1349 feet)
WKPS
Lake in Germany
shallowest of the Eifel maar lakes. It is located at a height of 368.1 metres above sea level (NN). Its surface area is about 60,000 square metres (650
Immerather_Maar
Cable car in Zurich, Switzerland
over a single intermediate tower with a height of 44 metres (144 ft), with a maximum height above ground level of 60 metres (197 ft). The span lengths
Adliswil-Felsenegg_cable_car
Top of a saturated aquifer
can also be simply explained as the depth below which the ground is saturated. The portion above the water table is the vadose zone. It may be visualized
Water_table
Height of the bottom of a cloud
multiply by 1000. This will give the altitude of the cloud base in feet above ground level. Put in a simpler way, 400 feet for every 1°C dew point spread. For
Cloud_base
Measurement of the height of the base of the lowest clouds
visual flight rules (VFR) operation. ICAO The height above the ground or water of the base of the lowest level of cloud below 6 000 metres (20 000 feet) covering
Ceiling_(cloud)
glossary of levelling terms. Levelling is a surveying method used to find relative height, one use of which is to ensure ground is level during construction
Glossary_of_levelling_terms
Long barrow in Oxfordshire, England
high. Next to it is a weathered sandstone megalith 1.8 metres in height above ground level, 2.0 metres in width and 0.5 metres thick. The stone may have
Lyneham_Longbarrow
intended here as enclosed structures with continuously occupiable floors and a height of at least 350 metres (1,148 ft). Such definition excludes non-building
List_of_tallest_buildings
Theorem in fluid mechanics
dynamics relating the speed of fluid flowing from a hole to the height of fluid above the hole. The law states that the speed v {\displaystyle v} of efflux
Torricelli's_law
Vertical measurement of the independence of a summit
alternative equivalent definition is that the prominence is the height of the peak's summit above the lowest contour line encircling it, but containing no higher
Topographic_prominence
Business in Konya, Turkey
Central Anatolia Region. The tower's official height is 163 m (535 ft) and has 42 floors above ground level. The top 2 floors are a revolving restaurant
Seljuk_Tower
Height in relation to a specified reference point
the distance above the ground directly below True altitude – altitude in terms of elevation above sea level Height – vertical distance above a certain point
Altitude
Under-construction skyscraper in Miami, Florida
the maximum allowable height in downtown Miami of 1,049 ft (320 meters) above sea level, or about 1,040 ft (317 meters) above ground, making it easily the
Waldorf_Astoria_Miami
Skyscraper located in the central business district of Levent in Istanbul
rises 54 floors above ground level, and has an above-ground roof height of 238 meters: the building has an overall structural height of 261 meters including
Istanbul_Sapphire
Ocean shape without winds and tides
systems. The geoid is often expressed as a geoid undulation or geoidal height above a given reference ellipsoid, which is a slightly flattened sphere whose
Geoid
Role of body height in sports
Height can significantly influence success in sports, depending on how the design of the sport is linked to factors that are height-biased due to physics
Height_in_sports
Residential skyscraper complex in Taiwan
completed in 2006, with a height of 120.95 m (396.8 ft) that comprise 29 floors above ground, as well as 3 basement levels. The complex contains 188 apartment
Chung_Yuet_Palace
Tower in Paris, France
three levels for visitors, with restaurants on the first and second levels. The top level's upper platform is 276 m (906 ft) above the ground—the highest
Eiffel_Tower
Prehistoric pit dwellings in Korea
woven tight enough to be effectively waterproof. The hut's low height above the ground meant that it dealt with wind relatively well and was relatively
Umjip
There is a height limit in Canberra Central of 617 metres (2,024 ft) above sea level, generally about 50 metres (160 ft) above ground level in Canberra
List of tallest buildings in Canberra
List_of_tallest_buildings_in_Canberra
Communications and observation tower in Toronto, Canada
the ground. Over the height of the tower, it varies from true vertical accuracy by only 29 mm (1.1 in). In August 1974, construction of the main level commenced
CN_Tower
airspace outside of terminal areas bottoms out at 2,200 feet (670 m) Above Ground Level (AGL), so there is more room to scud run legally. In northern Canada
Scud_running
Fixed-wing aircraft can fly down to 250 ft above ground level at a speed of up to 450 kt. Lower height limits apply for helicopters and in certain parts
Low_flying_military_training
Formula used to model how air pressure varies with altitude
gives two equations for computing pressure as a function of height, valid from sea level to 86 km altitude. The first equation is applicable to the atmospheric
Barometric_formula
Rare transient luminous events that occur over tops of thunder storms
gigantic jet—double the height of those previously observed—reaching around 70 km (45 mi) into the atmosphere. The jet was located above a thunderstorm over
Upper-atmospheric_lightning
List of prominent mountains in New England
comprises the 50 summits with the highest topographic prominence — a peak's height above the lowest contour which encloses that peak and no higher peak. The list
List of New England Fifty Finest
List_of_New_England_Fifty_Finest
Megatall skyscraper in Kuala Lumpur, Malaysia
December 2022, which marked its final height of 678.9 m (2,227 ft) above ground and 700.9 m (2,300 ft) above sea level. It is the tallest building in Malaysia—surpassing
Merdeka_118
Characteristic of electromagnetic radiation
potentially global reach. However, at frequencies above 30 MHz (VHF and higher) and in lower levels of the atmosphere, neither of these effects are significant
Line-of-sight_propagation
Airport
meters (6,890 ft × 148 ft) with an asphalt surface and a height of 137 meters above ground level. Gatot Subroto Airport is an Indonesian Army air base,
Gatot_Subroto_Airport
Multi-use stadium in Cerro de Pasco, Peru
4,338 meters (13,973 ft) above sea level. This makes it very difficult for players who are not used to playing at this height and has caused some controversy
Estadio Daniel Alcides Carrión
Estadio_Daniel_Alcides_Carrión
Experiment to determine the shape of the Earth
reproduced Wallace's results using three poles fixed at equal height above water level. When viewed through a theodolite, the middle pole was found to
Bedford_Level_experiment
Suspension bridge in the Czech Republic
Czech Republic. The bridge is 721 metres long and is at a height of up to 95 metres off the ground. It was opened on 13 May 2022. It was the longest of its
Sky_Bridge_721
RapidX's Delhi–Meerut terminal RRTS cum Meerut Metro station
wide. The rail tracks as the viaduct is situated at a height of 24 meters above the ground level. "Rapid railway to run between Delhi NCR to Meerut from
Meerut_South_RRTS_station
English legal term
underlies a different freehold at ground level. Works may be impossible without the consent of the freeholder above if any works could affect it, or need
Flying_freehold
List of definitions of terms and concepts commonly used in aerospace engineering
also References Above ground level – In aviation, atmospheric sciences and broadcasting, a height above ground level (AGL) is a height measured with respect
Glossary of aerospace engineering
Glossary_of_aerospace_engineering
Place for burial
century onwards, and continuing into the Renaissance, arcosolia were built above ground, particularly in the walls of churches. In these post-Roman era recesses
Arcosolium
Meteorological tool
a type of searchlight used to measure the height of the base of clouds (called the ceiling) above the ground. It is used in conjunction with an alidade
Ceiling_projector
supplementary feature Virga Light precipitation that evaporates well above ground level; mostly seen with species stratiformis, castellanus, and floccus.
List_of_cloud_types
Map indicating service areas of transmitting stations
(relative to 1 μV/m) at a height of 10 m above ground level. For mono it is 48 dB (relative to 1 μV/m). The receiving antenna height of 10m dates from the
Coverage_map
Building in Tokyo, property of Sony
2025. The redeveloped Ginza Sony Park structure spans eight levels (five floors above ground and three basement floors) and covers over 4,000 square meters
Ginza_Sony_Park
Structure used to support an overhead power line
crossing at Nanjing with a height of 257 m (843 ft). Sometimes (in particular on steel lattice towers for the highest voltage levels) transmitting plants are
Transmission_tower
Closed observation tower in Florida
be 392 feet (119.5 m) above sea level by the Federal Aviation Administration (FAA). Thus, the height of the tower above ground, including antennae, is
Lake_Placid_Tower
Barcelona Metro station
metres (596 feet) above sea level (one elevator though reaches an unspecified height of around 189 meters or 620 feet above sea level), the station also
El Coll – La Teixonera (Barcelona Metro)
El_Coll_–_La_Teixonera_(Barcelona_Metro)
Office skyscraper in Montreal, Quebec, Canada
(the elevation of Mount Royal) at 232.5m above mean sea level with a total height from the average ground level around first floor to roof of 205m (673ft)
1000_de_La_Gauchetière
Species of legume
a below-ground tree. Above ground, it looks like a shrub with a height of 20–100 cm (in rare cases up to 4m high). In addition, below ground the mesquite
Prosopis_farcta
Elevated walkway
walkway elevated one metre above ground level plus a cantilever platform 15 metres (49 ft) above the ground which allows canopy level views of the cool temperate
Canopy_walkway
Mechanical device
level than the load bed, also known as "above bed travel," and are therefore preferable for vehicles with bed heights lower than standard dock height
Tail_lift
Point with known height used in surveying when levelling
sea-level, or a mathematical/geodetic model that approximates the sea level known as the geoid). Elevation may be specified as normal height (above a reference
Benchmark_(surveying)
Folly in Stirlingshire, Scotland, United Kingdom
chimneys, cleverly disguised as Grecian urns. The upper floor, which is at ground level when approached from the raised northern lawn, contained two small cottage-like
Dunmore_Pineapple
Surveying device
lengths are adjusted to bring the tripod head to a convenient height and make it roughly level. Once the tripod is positioned and secure, the instrument is
Tripod_(surveying)
Yugoslavian Anti-Personnel mine
only a centimetre of the base showing above ground level. Alternatively, they may be buried diagonal to the ground surface, in such a way that the star-shaped
PMA-2_mine
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HEIGHT ABOVE-GROUND-LEVEL
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