In the previous chapter, you have seen an introduction to coordinate systems. You saw an example of how you can use Cartesian coordinates as well as polar coordinates to identify points on a flat, two-dimensional Euclidean space. It was already mentioned at that point that the real-world scenario is much more complex.
When you are making maps, you are showing things (objects, images, etc.) that are located on earth. Earth does not respect the rules that were shown in the Euclidean ...