The modern weather map, a chart showing area of similar air pressure and barometric changes by means of glyphs displayed on a map. These led to the discovery of the anti-cyclonic movement of wind around low-pressure areas
Normal correlation surface and regression, the idea that in a bivariate normal distribution, contours of equal frequency formed concentric ellipses, with the regression line connecting points of vertical tangents
Idea for "log-square'' paper, ruled so that normal probability curve appears as a straight line
This web version is dedicated to Arthur H. Robinson (1915-2004), who inspired and encouraged our interest; to Antoine de Falguerolles, who initiated it, and to les Chevaliers des Album de Statistique Graphique, who supported it with interest, enthusiasm, and resources. In particular, Gilles Palsky, Antoine de Falguerolles, Antony Unwin and Ruddy Ostermann contributed important images and background information. This work is supported by the National Sciences and Engineering Research Council of Canada, Grant OGP0138748.
Citations: References to information or images obtained from this web site should be cited as follows:
Friendly, M. & Denis, D. J. (2001).
Milestones in the history of thematic cartography, statistical graphics, and data visualization.
Web document, http://www.datavis.ca/milestones/. Accessed: