The Visual Variables Expressing Proportionality

Authored by: Nicolas Lambert , Christine Zanin

Practical Handbook of Thematic Cartography

Print publication date:  May  2020
Online publication date:  May  2020

Print ISBN: 9780367261290
eBook ISBN: 9780429291968
Adobe ISBN:


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This chapter explains how to represent absolute quantitative data that express a proportionality relationship between geographical objects: only the visual variable size is adapted here. This is demonstrated, and the rules for constructing the visual variable size are clarified. Other approaches such as Bertin’s dots, dot density maps, or varying height and volume are presented.

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