A map maker is formally called a cartographer. A cartographer is trained in cartography, which incorporates elements of both science and art.
Cartography involves both learning to illustrate maps and learning about the science behind maps. Some maps are much simpler to illustrate and understand than others. These maps, classified as general cartography, are simple maps created for the masses. The other type of cartography is thematic cartography, meant for niche audiences.
Maps can depict geographical features on top of simple land mass shapes. One example of this is including contour lines to illustrate elevation changes. Finally, maps can be drawn to scale, which is especially important when used for navigation purposes.