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A world map is a map of most or all of the surface of Earth. World maps, because of their scale, must deal with the problem of projection. Maps rendered in two dimensions by necessity distort the display of the three-dimensional surface of the Earth. While this is true of any map, these distortions reach extremes in a world map.
In aviation, atmospheric sciences and broadcasting, a height above ground level (AGL [1] or HAGL) is a height measured with respect to the underlying ground surface.This is as opposed to height above mean sea level (AMSL or HAMSL), height above ellipsoid (HAE, as reported by a GPS receiver), or height above average terrain (AAT or HAAT, in broadcast engineering).
For elevations or altitudes, often just the abbreviation MSL is used, e.g., Mount Everest (8849 m MSL), or the reference to sea level is omitted completely, e.g., Mount Everest (8849 m). [ 7 ] Methods of measurement
This page was last edited on 26 November 2022, at 23:40 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Country Depth Notes / references 1= Caspian Sea and its shores: Azerbaijan, Russia, and Kazakhstan: −28 m (−92 ft) Caspian Depression: 1= Baku: Azerbaijan: −28 m (−92 ft) lowest lying national capital in the world, Caspian Depression: 3: Atyrau Airport: Kazakhstan: −22 m (−72 ft) lowest international airport, Caspian Depression: 4 ...
The straight-line distance between the central point on the map to any other point is the same as the straight-line 3D distance through the globe between the two points. c. 150 BC: Stereographic: Azimuthal Conformal Hipparchos* Map is infinite in extent with outer hemisphere inflating severely, so it is often used as two hemispheres.
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As a result of such movement, In 1998, a recommendatory letter to participate in the Global Mapping Project was sent from the United Nations to NGIAs of respective countries in the world. Further, at the World Summit on Sustainable Development (Johannesburg Summit) held in 2002, global mapping was included in the Plan of Implementation.
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