Cartography is the art, science and technology of making maps. Maps are the communication media for geographers to express their views about our world, in a similar way that language is for literary authors. Understanding of map-making processes and mastering the skills of map-reading greatly enhance the presentation of geographical information in graphic format. Moreover, this format can be an effective tool for data analyses such as, for example, when examining the relationship between two distributions using simple transparent overlays. Students can apply such a mapping ability to their natural or social science courses or in their professional fields.