What are global geodetic systems?

A global geodetic system is like a super-detailed map that helps us know exactly where we are on Earth, no matter how far we go.

Imagine you have a big, round ball, like a globe. Now think of it as Earth. A geodetic system gives this ball tiny marks and lines so we can say exactly where something is, like giving every point on the globe a special address.

If you were playing a treasure hunt all over the world, a global geodetic system would be your map. It uses satellites that orbit Earth to help us find our location with amazing accuracy, just like how a GPS in your phone helps you find your way home.

There are different kinds of geodetic systems, and each one is like a slightly different version of the same treasure map. Some people use one system, others use another, but they all help us know where we are, just like different maps can show you the best way to get somewhere.

So next time you use your phone’s GPS or see a satellite picture of Earth, remember, it's all thanks to global geodetic systems!