The earth in the standard sense is oval, not round, but the globe is really round, which makes many people puzzled. In fact, the globe did not take into account so many environmental problems of the earth when it was made, because the globe was made earlier, and it was not found that the earth was elliptical at that time.

The shapes of continents and oceans that we see on the world map are actually quite different from the real ones. For example, the map of our country looks like a rooster, but it is not the scale we see in the real earth environment, because the earth is round and three-dimensional, while the map is flat and three-dimensional. No matter what painting method you use, you can't show a three-dimensional sense. So what the globe and the map see are some abstractions of the earth.

The globe is really three-dimensional, and it can more vividly see the overall shape of the ocean and the earth where our continent is located. However, when the map 1 appeared, it was not found that the earth was oval. Even if this small mistake is found now, it will not affect the overall drawing technology. When we look for some points on the map as ordinary people, there is no need to pursue the recovery of the earth 100%, such as a special scale. It is not very useful to ask the ellipse of the map to have a better effect, because we don't need to be accurate to that extent.

It doesn't mean that an oval globe can't be made, nor does it mean that the existing technology of human beings can't observe the ellipticity and radian of the earth. In fact, these can be mapped completely, but for us normal people, we don't need such an accurate cartographer. Then, for those professional organizations, it will be more convenient for people to find the corresponding data with professional three-dimensional simulation tools, and basically there is no need for an oval globe, so the shape of the globe has not been changed.