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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.
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 ...
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 ...
Stadiametric rangefinding, or the stadia method, is a technique of measuring distances with a telescopic instrument.The term stadia comes from a Greek unit of length Stadion (equal to 600 Greek feet, pous) which was the typical length of a sports stadium of the time.
Pages in category "Length, distance, or range measuring devices" The following 60 pages are in this category, out of 60 total. This list may not reflect recent changes .
A stadimeter is an optical device for estimating the range to an object of known height by measuring the angle between the top and bottom of the object as observed at the device. It is similar to a sextant , in that the device is using mirrors to measure an angle between two objects but differs in that one dials in the height of the object.
Typical distance measurements were between mountain tops. The tellurometer design yields high accuracy distance measurements over geodetic distances, but it is also useful for second order survey work, especially in areas where the terrain is rough and/or the temperatures extreme.