Altitude or height is defined based on the context in which it is used. As a general definition, altitude is a distance measurement in the vertical or "up" direction, between a reference datum and a point or object; the reference datum often varies according to the context. Although the term altitude is used to mean the height above sea level of a location, in geography the term elevation is preferred for this usage. Vertical distance measurements in the "down" direction are referred to as depth. In aviation, the term altitude can have several meanings, is always qualified by explicitly adding a modifier, or implicitly through the context of the communication. Parties exchanging altitude information must be clear. Aviation altitude is measured using either mean sea level or local ground level as the reference datum. Pressure altitude divided by 100 feet is the flight level, is used above the transition altitude; when flying at a flight level, the altimeter is always set to standard pressure. On the flight deck, the definitive instrument for measuring altitude is the pressure altimeter, an aneroid barometer with a front face indicating distance instead of atmospheric pressure.

There are several types of altitude in aviation: 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. Absolute altitude is the vertical distance of the aircraft above the terrain over which it is flying, it can be measured using a radar altimeter. Referred to as "radar height" or feet/metres above ground level. True altitude is the actual elevation above mean sea level, it is indicated altitude corrected for non-standard pressure. Height is the vertical distance above a reference point the terrain elevation. In UK aviation radiotelephony usage, the vertical distance of a level, a point or an object considered as a point, measured from a specified datum. Pressure altitude is used to indicate "flight level", the standard for altitude reporting in the U. S. in Class A airspace. Pressure altitude and indicated altitude are the same when the altimeter setting is 29.92" Hg or 1013.25 millibars.

Density altitude is the altitude corrected for non-ISA International Standard Atmosphere atmospheric conditions. Aircraft performance depends on density altitude, affected by barometric pressure and temperature. On a hot day, density altitude at an airport may be so high as to preclude takeoff for helicopters or a loaded aircraft; these types of altitude can be explained more as various ways of measuring the altitude: Indicated altitude – the altitude shown on the altimeter. Absolute altitude – altitude in terms of the distance above the ground directly below True altitude – altitude in terms of elevation above sea level Height – vertical distance above a certain point Pressure altitude – the air pressure in terms of altitude in the International Standard Atmosphere Density altitude – the density of the air in terms of altitude in the International Standard Atmosphere in the air The Earth's atmosphere is divided into several altitude regions; these regions finish at varying heights depending on season and distance from the poles.

The altitudes stated below are averages: Troposphere: surface to 8,000 metres at the poles, 18,000 metres at the Equator, ending at the Tropopause Stratosphere: Troposphere to 50 kilometres Mesosphere: Stratosphere to 85 kilometres Thermosphere: Mesosphere to 675 kilometres Exosphere: Thermosphere to 10,000 kilometres The Kármán line, at an altitude of 100 kilometres above sea level, by convention defines represents the demarcation between the atmosphere and space. The thermosphere and exosphere are regions of the atmosphere that are conventionally defined as space. Regions on the Earth's surface that are high above mean sea level are referred to as high altitude. High altitude is sometimes defined to begin at 2,400 meters above sea level. At high altitude, atmospheric pressure is lower than; this is due to two competing physical effects: gravity, which causes the air to be as close as possible to the ground. The temperature profile of the atmosphere is a result of an interaction between radiation and convection.

Sunlight in the visible spectrum heats it. The ground heats the air at the surface. If radiation were the only way to transfer heat from the ground to space, the greenhouse effect of gases in the atmosphere would keep the ground at 333 K, the temperature would decay exponentially with height

Imperial Doom is the debut album by American death metal band Monstrosity. It was released on May 1992, through Nuclear Blast; the album received excellent ratings in the press. A triumphant European tour was accomplished, but a little following disagreements regarding royalties, Monstrosity left Nuclear Blast. All lyrics by Lee Harrison. All music as noted. MonstrosityGeorge "Corpsegrinder" Fisher – vocals Jason Gobel – lead & rhythm guitars Jon Rubin – lead & rhythm guitars Mark Van Erp – bass Lee Harrison – drums, percussionProductionMonstrosity – producer Jim Morris – recording, producer Dan Seagrave – artwork Markus Staiger – executive producer Imperial Doom at Discogs Imperial Doom at AllMusic

Carmelray Industrial Park 1 is located in Canlubang, Laguna in the Philippines on a wide stretch of land measuring 270 hectares. Developed in stages, Phase 1 and Phase 2 cover 135 hectares respectively, it is a integrated industrial park. Its aim is to provide facilities. Apart from the industrial facilities, CIP1 has administrative and support service centers for its locators, as well as a commercial district. One of its more important facilities is a Special Export Processing Zone, where investors and locators may avail of import/export documentation as well as tax incentives; this industrial zone is bounded by Pittland, Palao and Carmel. It is situated at the middle part of Canlubang located to the Sitio Palao of Kapayapaan Road; the nearest residential area is Morning Fields. It has a 43 or more than companies located at Carmelray Industrial Park 1 inside in the Barangay Canlubang. Carmelray Industrial Park 2 Silangan Industrial Park BDO Bank Carmelray Branch Dualtech Training Center - Calamba San Sebastian Recoletos Canlubang Xavier School, Canlubang Security Bank -The Strips Carmeltown Carmelray 1 Branch 5 km- to Canlubang Proper Industrial Redevelopment Zone CIP 1