The Anglo-French Survey was like a big game of measuring things. Imagine if you and your friend wanted to measure the distance between your houses, but you needed to use special tools to do it. That's what the survey was like, but on a much bigger scale!
In the late 1700s, the countries of England and France wanted to figure out exactly where their border was located. They thought it would be a good idea to work together and use fancy equipment to take measurements and map out the area.
They sent teams of surveyors out into the countryside with things like telescopes, measuring sticks, and compasses. These tools helped them figure out the exact positions of different landmarks, like mountains and lakes.
Once they had all of their measurements, the surveyors created a detailed map of the border between England and France. This was important because it helped the countries avoid any confusion or disagreements in the future.
The surveyors worked on this project for several years, from 1784 to 1790. They traveled through some very difficult terrain, like mountains and valleys, but they kept going until they completed their mission.
In the end, the Anglo-French Survey was a big success. It showed that when people work together, they can accomplish great things, like making sure that everyone knows where their borders are.