Choose large symbols the reader can touch
Determine which layers to include together on each map type, and choose how to symbolize them. Choose large monochromatic symbols that can be distinguished by touch.
The Tactile Atlas of Switzerland gives people with visual impairment access to quality cartography. We love this approach to understanding geography. The tactile maps are made to be touched rather than seen. Raised symbols provide tangible differentiation for each feature. The atlas shares the sense of place in a new way for those unable to read traditional maps. Its methodology paves the way for the development of more tactile maps representing other areas and various themes around the globe.
The usual rules do not apply when you want your map to be readable by fingertips rather than eyes. Symbols must be bigger and spaced wider than dictated by traditional map standards. Cartographically, it’s not advisable to portray data at a scale larger than it was captured to avoid implying more precision than is accurate. In the case of the Tactile Atlas, that is exactly what was done to ensure an adequately thin distribution of features. Too many features too close together, or with too much complexity, would be difficult to discern by touch.
Map Author
As a cartographer at Esri Switzerland, I love to design compelling maps and visualizations and to work on exceptional projects such as the tactile maps.
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