based on
. Bertin
1967
Retina
(visual ) variables and their Characteristics
Edward
Tufte 1983
Optimise
the Data-Ink ratio
Cleveland
& McGill 1984
Empirical
estimates of the effectiveness of different graphical encoding methods:
Jock Mackinlay 1986
Two
measures for choosing the right visualisation :
•Expressiveness
•Effectiveness