Convert Earth's polar radius to chain (US survey)
Please provide values below to convert Earth's polar radius [R_p] to chain (US survey) [ch (US)], or Convert chain (US survey) to Earth's polar radius.
How to Convert Earth's Polar Radius to Chain (Us Survey)
1 R_p = 315991.588447926 ch (US)
Example: convert 15 R_p to ch (US):
15 R_p = 15 × 315991.588447926 ch (US) = 4739873.82671888 ch (US)
Earth's Polar Radius to Chain (Us Survey) Conversion Table
| Earth's polar radius | chain (US survey) |
|---|
Earth's Polar Radius
The Earth's polar radius is the distance from the center of the Earth to the North or South Pole, approximately 6,356.8 kilometers.
History/Origin
The fact that the Earth is an oblate spheroid, flattened at the poles, has been known since the 18th century. Modern measurements are made with high precision.
Current Use
The Earth's polar radius is a key parameter in geodesy and is used to define the Earth's shape and gravitational field.
Chain (Us Survey)
A U.S. survey chain is a unit of length equal to 66 U.S. survey feet.
History/Origin
The U.S. survey chain is based on the U.S. survey foot, which was slightly different from the international foot. The use of survey units was officially phased out in 2022.
Current Use
The U.S. survey chain was used for land surveying in the United States.