Day

March 26, 2019

26
Mar
2019
1

An OS history of the theodolite

If you’re an avid reader of our blog or have some surveying knowledge, you may well have heard of a theodolite before. A key instrument in the mapping of Britain (and pretty much everywhere else!), a theodolite is a simple concept built into a precision instrument – a telescope with graduated horizontal and vertical circles attached to enable angles to be measured. Intrigued by this implement, we decided to find out more… Read More