Pictures that apply black and white in it are not just for fun. There is a theory behind the election using black and white. Both depict opposites. White is light and black is the absence / no light. If an image uses it, of course, there is an explanation and meaning hidden inside it even though it looks very simple to the eye because there is no color element in it.
The World map is a picture that has very broad detail. Many people use color to make a difference for each country or element on a map. But for some people, using a black and white world map is considered as something effective. Because the impression given is sharp, forms and also patterns made in the world map become more assertive and focused. So that when the eye sees the world map will be trained in more detail on the shape and it will affect the memory. In addition, black and white can also be a choice for people who love minimalism.
If you are going to use black and white in the picture, make sure you have a clear purpose. Because that is the value of black and white. If you want to convey something serious and formal with the picture, you can use black and white. There will be no distraction received by the eye of the beholder because only see black and white. Therefore, black and white is a choice that is considered and used in adults. Children will be less interested and understand from using black and white because they are craving for more colors.
The world map which is given the black and white effect consists of two types. The first is not possible to be colored because it has been filled with black and white. The second is what allows to be colored. However, in this second type, colors can be given with the condition that black and white in question are black on the outline and white on the existing space. So if you want to give color to the black and white world map, make sure you have the second type. So the world map will look like coloring pages. Because there is space that can be filled by color, why don't you try to put some color?