ELI5: Explain Like I'm 5

Geographic coordinate conversion

Geographic coordinate conversion is like giving directions to someone who is lost. Imagine you have a toy car and you want to tell your friend where it is on a big map. To do this, you need to give instructions on how to find the car.

But there's a problem. Different people might use different maps or languages to describe locations. For example, your friend might use a different map with different names for the streets or cities in comparison to yours.

This is where geographic coordinate conversion comes in. It helps people convert locations from one map or system to another. It's like translating the directions to a different language so that everyone can understand.

In geography, we use two main coordinate systems to describe locations on the Earth’s surface: the Geographic Coordinate System (GCS) and the Universal Transverse Mercator (UTM).

The GCS uses two numbers, called latitude and longitude, to describe a location on the Earth's surface. Imagine a big round orange cut in half, you can measure the distance from top to bottom (latitude) and from side to side (longitude). It's like a grid on a globe - the lines of latitude and longitude form a pattern that helps us locate places on Earth.

On the other hand, the UTM is like slicing the orange into many pieces and flatting them out. It uses a grid that divides the Earth's surface into many small rectangles of equal size, called zones. Each zone is labeled with a number for easting and a letter for northing. It's like giving a street address for the location rather than just saying it's on a specific latitude and longitude.

Sometimes, we need to convert locations from one system to another. For example, you might have the location of your toy car in terms of latitude and longitude, but your friend might need it in terms of UTM coordinates. Or you might be using a map that uses a different GCS than your navigation system.

Geographic coordinate conversion helps us do this conversion. It's like having a translator who can convert between different languages so that we can communicate with people from different parts of the world.