the post of Chamberlain

A chamberlain is an officer in charge of managing a household. In many countries there are ceremonial posts associated with the household of the sovereign.

Historically, monasteries, cathedrals and mediaeval cities also had the post of chamberlain. The Finance Director of the City of London is still called Chamberlain

Moon Crater

Chamberlin is a lunar crater that is located on the far side of the Moon, just past the southeastern limb. It lies to the southeast of the crater Jeans, and Moulton is attached to the southeastern rim of Chamberlin. This crater is located in a part of the lunar surface that has undergone resurfacing of crater interiors, producing dark-hued crater floors.

Chamberlin keyboard

The Chamberlin is also an electro-mechanical keyboard instrument related to the Mellotron. It was created by Californian inventor Harry Chamberlin in 1946. Various models and versions of these Chamberlin music products exist. While most are keyboard-based instruments, there were also early drum machines produced and sold.

Chamberlin trimetric projection

The Chamberlin trimetric projection is a map projection where three points are fixed on a sphere and used to triangulate the transformation onto a plane. It was developed in 1947 by Wellman Chamberlin, chief cartographer of the National Geographic Society.

Unlike a plane-to-plane triangulation, where three compass circles will intersect at a unique point, the Chamberlin trimetric projection will map compass circles from a sphere in such a way so that each pair of circles will result in distinct points of intersection. Usually a triangle is generated from these intersections and the barycenter is chosen to be the point of mapping.