Chain surveying
Gunter 100 links used a real measuring chain. These, China and Link, have become their own units.
Contents
1 Description
Method 2
3 units of length
4 Similar measuring chains
5 See also
6 References
7 External links
Description
1 Gunter's chain = SI units
20.12 m 2,012 cm
US customary / Imperial Units
22.00 66.00 feet YD
1 Gunter link = SI units
0.2012 mm 201.2 mm
US customary / Imperial Units
0.6600 to 7,920 feet
Intermediate chain simplification measure by the brass rings marked off in groups of 10 to 100 links, is divided into. 10 links each link to slightly less than 6 feet 8 inches, with 7.92 inches are. Full length is 66 feet of chain. A square link exactly one hundred thousandth of an acre and a square one ten thousandth of China or is it 0,0404685642 m². It is about 62¾ inches square.
Measured 10 square chains to an acre Gunter system, since the entire process of measuring the traditional English measure, No. 4, and No. 10 on the basis of the decimal system based on the newly introduced: Gunter's chain of two seemingly incompatible systems decimalized calculated between chains and links, and then dividing the result by 10 acres can be replaced by [1]
Method
Gunter's chain of other parcels of land surveying a field or method first to determine the corners and other important places, and then take the two points at a time, to measure the distance between them. Chainman is assisted by a surveyor. From A stick (usually a noticeable colored wooden poles) is placed in the ground at the point of destination. The chain is laid out in the direction of the rod starting from the start point, and the surveyor then chainman to make perfectly straight chain guide and direct pointing stick out. The forward end of the series a pin is put in the ground, and it is at this point last end, and China to the destination point is extended again, so that the chain is moved forward . This process is called by, or in the US, chaining, surveyor many full length (chains) that has been placed on how the notes destination rod, is repeated until it is reached, and then the how many links in the distance being measured (a hundredth part of China) can read.
The whole process needs to be repeated for all pairs of points are others, and the land plot is a simple matter to make a scale diagram. The process is surprisingly accurate and requires only very little technology. It is at ground level and continuous-eg physical or major waterways throughout the recession, if not practicable, surveying a chain is simple. The ground plane triangulation method (slope not significantly different) requires that. On sloping ground, the chain needed undulations shown by the increase in the length or area that did not drain, an increase by the end of "leveled" had to be. [2]
Unit of length
Gunter's chain in the steel tape, (a form of tape measure) was superseded by it, the legacy of 66 feet (or 100 links) are measured the length of the chain in a new unit was. [3] This unit still exists as a British railway, as well as Australia and the United States location identifier in some areas. In the United States, for example, a two-year public land survey plats maintain the consistency of the database are published in series unit.
Other length in some places, for example in Ireland, Scotland 8.928 inch (CA. 0,227 m) and 10.08 inches (ca. 0.256 m) have been used. [Citation needed]
Just a chain length of a cricket pitch (22 yards) is. [4]
Measuring chains similar
A similar system of low popularity,, Ramsden US or China consists of 100 links engineered systems, each foot (0.3048 m) long
Less common Rathborn system, from the 17th century, two bars (33 feet, 10.0584 m) length is based on a 200 link chain. Each rod (perch) which make it ten seconds (") called 100 links, (1.98 inch, 50.292 mm each), consisting of a prime (', 19.8 inch, 0.503 m). [5]
Vincent Wing 9.90 inches links, most commonly 40 chains chains with links to 33 ft half. Sometimes these chains American colonies, particularly in Pennsylvania was used
No comments:
Post a Comment