Ordnance Survey surveyors are taking 20,000 measurements a day as they try to keep up with changes and developments in the country's landscape.

Advances in technology mean collecting the data to make sure we have the most up-to-date maps has changed a lot over the last 200 years.

But with six and a half thousand news homes planned for the former barracks at Waterbeach in Cambridgeshire alone, it's not a job that's getting any easier!

Watch a report by ITV News Anglia's Claire McGlasson

An OS surveyor mapping out a new housing estate in Waterbeach in Cambridgeshire Credit: ITV News Anglia