However, manually producing such maps is labor-intensive and the effect of shapes remains unclear. To visually support such route-finding, designers often distort the layout by embedding symbolic shapes (e.g., circular routes) in order to guide readers' attention (e.g., Moscow map and Japan railway map). These maps are often advertised on a web page or pamphlet highlighting routes from source to destination stations. Metro or transit maps, are schematic representations of transit networks to facilitate effective route-finding. We conclude this survey with a discussion on the current research status, open challenges, and future directions. A systematic categorisation is introduced to describe the design pipeline, and an extensive analysis of perspectives is conducted to support the proposed taxonomy. To elaborate the current research status, this state‐of‐the‐art report provides an overview of the transit map generation process, primarily from Design, Machine, and Human perspectives. Nonetheless, the quality gap between manually‐drawn maps and machine‐generated maps is still large. To improve this, scientists investigate fully‐ or semi‐automatic techniques in order to produce high quality transit maps using computers and further examine their corresponding usability. Creating a transit map is a time‐consuming process, which requires iterative information selection, layout design, and usability validation, and thus maps cannot easily be customised or updated frequently. Transit maps are designed to present information for using public transportation systems, such as urban railways.
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