Satellite navigation systems that provide enhanced accuracy and integrity monitoring usable for civil navigation are classified as follows:GNSS-1 is the first generation system and is the combination ...
In graphics, superimposition is the placement of an image or video on top of an already-existing image or video, usually to add to the overall image effect, but also sometimes to conceal something (su ...
The earliest known map is a matter of some debate, both because the definition of "map" is not sharp and because some artifacts speculated to be maps might actually be something else. A wall painting, ...
Fortune was founded by Time co-founder Henry Luce in 1929 as "the Ideal Super-Class Magazine," a "distinguished and de luxe" publication "vividly portraying, interpreting and recording the Industrial ...
Further information: Operation Barbarossa, Einsatzgruppen, World War II casualties of the Soviet Union and Nazi crimes against Soviet POWsAnimation of the WWII European TheatreSoviet civilians in Leni ...
The start of the war in Europe is generally held to be 1 September 1939, beginning with the German invasion of Poland; Britain and France declared war on Germany two days later. The dates for the begi ...
The gnomonic projection is said to be the oldest map projection, developed by Thales in the 6th century BC. The path of the shadow-tip or light-spot in a nodus-based sundial traces out the same hyperb ...
To prove that the minor arc of a great circle is the shortest path connecting two points on the surface of a sphere, one has to apply calculus of variations to it.Consider the class of all regular pat ...
Azimuthal projections have the property that directions from a central point are preserved and therefore great circles through the central point are represented by straight lines on the map. Usually t ...
Pilots use aeronautical charts based on LCC because a straight line drawn on a Lambert conformal conic projection approximates a great-circle route between endpoints for typical flight distances. The ...
When an aircraft is flying under instrument flight rules (IFR), they often will have no visual reference to the ground, and must therefore rely on internal (e.g. GPS) or external (e.g. VOR) aids to na ...
The geoid surface is irregular, unlike the reference ellipsoid which is a mathematical idealized representation of the physical Earth, but considerably smoother than Earth's physical surface. Although ...
Mercator's 1569 edition was a large planisphere measuring 202 by 124 cm, printed in eighteen separate sheets. As in all cylindrical projections, parallels and meridians are straight and perpendicular ...
In geology, a fault is a planar fracture or discontinuity in a volume of rock, across which there has been significant displacement along the fractures as a result of earth movement. Large faults with ...
Lithologies Rock units are typically represented by colors. Instead of (or in addition to) colors, certain symbols can be used. Different geologic mapping agencies and authorities have different stand ...
