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  2. Tiled web map - Wikipedia

    en.wikipedia.org/wiki/Tiled_web_map

    Tiles are 256x256 pixels; At the outer most zoom level, 0, the entire world can be rendered in a single map tile. Each zoom level doubles in both dimensions, so a single tile is replaced by 4 tiles when zooming in. This means that about 22 zoom levels are sufficient for most practical purposes.

  3. M2 Bradley - Wikipedia

    en.wikipedia.org/wiki/M2_Bradley

    The M2 Bradley, or Bradley IFV, is an American infantry fighting vehicle that is a member of the Bradley Fighting Vehicle family. It is manufactured by BAE Systems Land & Armaments (formerly United Defense ) and entered service in 1981, with fielding beginning in 1983.

  4. Bradley Fighting Vehicle - Wikipedia

    en.wikipedia.org/wiki/Bradley_Fighting_Vehicle

    The M2/M3's primary armament is a 25 mm chain gun using either 100 or 300 rounds per minute, accurate to 1.9 mi (3,000 metres). It is armed with a TOW missile [a] launcher capable of carrying two loaded missiles. The missiles, capable of destroying most tanks to a maximum range of 13,000 ft (4,000 m), can only be fired while the vehicle is ...

  5. Space Shuttle thermal protection system - Wikipedia

    en.wikipedia.org/wiki/Space_Shuttle_thermal...

    After the tile was affixed to the cement, a jack held it in place for another 16 hours. In March 1979 it took each worker 40 hours to install one tile; by using young, efficient college students during the summer the pace sped up to 1.8 tiles per worker per week. Thousands of tiles failed stress tests and had to be replaced. By fall NASA ...

  6. Square metre - Wikipedia

    en.wikipedia.org/wiki/Square_metre

    The square metre (international spelling as used by the International Bureau of Weights and Measures) or square meter (American spelling) is the unit of area in the International System of Units (SI) with symbol m 2. [1]

  7. Hectare - Wikipedia

    en.wikipedia.org/wiki/Hectare

    Image comparing the hectare (the small blue area at lower left) to other units. The entire yellow square is one square mile.. The hectare (/ ˈ h ɛ k t ɛər,-t ɑːr /; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm 2), that is, 10,000 square metres (10,000 m 2), and is primarily used in the measurement of land.

  8. Foot-candle - Wikipedia

    en.wikipedia.org/wiki/Foot-candle

    The foot-candle is defined as one lumen per square foot. This unit is commonly used in lighting layouts in parts of the world where United States customary units are used, mainly the United States. [1] Nearly all of the world uses the corresponding SI derived unit lux, defined as one lumen per square meter.

  9. Grammage - Wikipedia

    en.wikipedia.org/wiki/Grammage

    Grammage and basis weight, in the pulp and paper industry, are the area density of a paper product, that is, its mass per unit of area. Two ways of expressing the area density of a paper product are commonly used: Expressed in grams (g) per square metre (g/m 2), regardless of its thickness [1] (known as grammage). This is the measure used in ...