An Ordnance Survey Bench mark (BM) is a survey mark made by the Ordnance Survey to record height above the Ordnance Datum.
selfish movment
Ordnance Survey is an executive agency of the United Kingdom government. It is the national mapping agency for Great Britain, and one of the world's largest producers of maps. The name reflects the original military purpose of the organization (see ordnance and surveying) in mapping Britain during the Napoleonic Wars when there was a threat of invasion from France, and its logo includes the War Department's broad arrow heraldic mark. source: http://en.wikipedia.org/wiki/Ordnance_Survey
A sink is where a watercourse disappears into the ground, whereas an issue (Iss) is where ground water is released, as in a spring.
Mark Henry: 620 pounds.
There are many websites that specialize in ordnance surveys. These companies provide mapping of land that aids civilians in many different ways. The best way is to use the National Grid.
Ordnance Survey International was created in 1946.
There are many places where one can find an ordnance survey map. One looking to find an ordnance survey map should visit the official Ordnance Survey website and click the 'Get a Map' link.
GTS stands for Great Trigonometrical Survey. This is a standard bench mark marked with respect to Mean Sea Level.
The name dates back to World War II. Much of the mapping carried out during the war was done by the Department of Ordnance (the guys who take care of munitions, artillery, tanks etc.). Their maps then, were known as Ordnance Survey maps. Today, Ordnance Survey maps are carried out by civilian teams and have nothing to do with ordnance but the name has stuck.
ordnance survey maps. maps made by the ordnance survey
what is the importance of a ordnance survey map to uniformed public services?
Grand traingular survey
The UK
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The Ordnance Survey is the national mapping agency of Great Britain. On an Ordnance Survey map, a zoo is represented by an elephant.
GTS benchmark is called Great trigometical survey benchmark. its position is decided by survey of India department. it RL is decided with reference to MEAN SEA LEVEL. no of benchmark, position and location is given in catalogue of survey of India department.
Ordnance Survey