A more thorough explanation:

A geodetic-survey system is a way to describe land using marks made at specific longitude and latitude points. These marks are called benches and are used to measure and map out real property in the United States.

For example, if you wanted to build a new house on a piece of land, you would need to know the exact location and size of the property. The geodetic-survey system provides this information by using benches to create a unified form of measurement.

Another example is when a city wants to plan out new roads or infrastructure. They can use the geodetic-survey system to accurately measure and map out the land, making it easier to plan and build.

Overall, the geodetic-survey system is an important tool for accurately describing and measuring land in the United States.