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Length; system unit code (other) symbol or abbrev. notes conversion factor/m combinations SI: gigametre: Gm Gm US spelling: gigameter: 1.0 Gm (620,000 mi) megametre: Mm Mm US spelling: megameter: 1.0 Mm (620 mi) kilometre: km km US spelling: kilometer: 1.0 km (0.62 mi) km mi; hectometre: hm hm US spelling: hectometer: 1.0 hm (330 ft) decametre ...
The present passenger railway line (Dammam-Riyadh Railway Line 1) from Riyadh to Dammam via Buqayq and Hofuf, measuring 449 km (279 mi), was completed in 1985. Along with the decrease in distance, this shortened the time taken for the journey between the two cities from 7 hours to 5 hours.
Length measurement, distance measurement, or range measurement (ranging) all refer to the many ways in which length, distance, or range can be measured. The most commonly used approaches are the rulers, followed by transit-time methods and the interferometer methods based upon the speed of light .
The hand-cut glass and marble mosaic, measuring 250 square metres (2,700 sq ft) and fabricated with Clarke's assistance, was the largest in the world at the time. [23] The dome's apex, at 40 metres (131 ft 3 in) above the arrivals level roadway, is higher than all the other structures in the passenger complex with the exception of the control ...
The formulas involved can be complex and in some cases, such as in the ECEF to geodetic conversion above, the conversion has no closed-form solution and approximate methods must be used. References such as the DMA Technical Manual 8358.1 [15] and the USGS paper Map Projections: A Working Manual [16] contain formulas for conversion of map ...
Construction of the Dammam–Riyadh line in 1947. The Dammam–Riyadh line was opened in 1981. Planning for the line started in 1947 with an agreement between King Ibn Saud and ARAMCO to lay a 547 km (340 mi) freight line.
Length ; system unit unit-code symbol or abbrev. notes sample default conversion combination output units SI: megametre: Mm Mm US spelling: megameter: 1.0 Mm (620 mi) kilometre: km km US spelling: kilometer: 1.0 km (0.62 mi) km mi; metre: m m US spelling: meter: 1.0 m (3 ft 3 in) m ft; m ftin; centimetre: cm cm US spelling: centimeter: 1.0 cm ...
WGS84 angle to distance conversion: Image title: Length of one degree (black), minute (blue) and second (red) of latitude and longitude in metric (upper half) and imperial (lower half) units at a given latitude in WGS84 by CMG Lee. For comparison, dotted lines denote corresponding lengths assuming a spherical Earth.