In this video, the concept of dimension 2 is explored by discussing the geometry of the Earth and how to locate any point on its surface using longitude and latitude. The stereographic projection of the Earth is also discussed, where the whole Earth, except the North Pole, can be represented on a plane. This map is called the stereographic projection and is conformal, meaning it preserves shapes but not sizes. The video ends with a glimpse into the concept of the fourth dimension.
The math of geography on the earth, the latitudes and longitudes, and the stereographic projection of the earth are explained in this video.