Western Han map, circa 180 BCE
Gerardus Mercator, world map, 1569
Christopher Scheiner, sunspots, 1630
Joseph Priestley, timeline of lives, 1765
William Playfair, line graph (time series chart), 1786
William Playfair, line graph (time series chart), 1800
William Playfair, bar graph, 1786
Charles Joseph Minard, figurative map of Napoleon's Russian campaign, 1869
http://earthquake.usgs.gov/earthquakes/feed/v1.0/ is a source of data on earthquakes
How can we visualize this data?