Comments on: Perceptual Scaling of Map Symbols

By: Fred Trotter » Blog Archive » Hacking data: showing patterns in kids health

Tue, 19 Apr 2011 12:47:01 +0000

[...] Using circles to represent scaled data is problematic. There is solid research indicating that humans have trouble estimating the area of circles in relation to each other… So I used the ratio suggested by James Flannery to counter this [...]

By: vis4.net - über Infografiken und Datenvisualisierungen in Flash, HTML5, SVG und Processing

Thu, 07 Apr 2011 11:00:59 +0000

[...] common mistake whenever circles are involved in data visualization. It's been described several times (also by myself), and while there is still some discussion about the best way to map numbers to [...]

By: indiemaps.com/blog » classed cartograms

indiemaps.com/blog » classed cartograms — Sat, 17 Oct 2009 04:16:46 +0000

[...] of academic cartography have established. The graph below (from John Krygier’s excellent blog post on perceptual scaling) sums up the average response to 1, 2, and 3D proportional [...]

By: Olympic Medal Map « history-ing

Olympic Medal Map « history-ing — Wed, 06 Aug 2008 00:02:31 +0000

[...] humans to accurately estimate its relative size. John Krygier of Making Maps: DIY Cartography has a great post about the entire [...]

By: indiemaps.com/blog » wiscMapper

indiemaps.com/blog » wiscMapper — Fri, 30 May 2008 20:02:45 +0000

[...] Perceptual scaling for proportional symbols using Flannery’s exponent [...]