The Washington Post’s Christopher Ingraham compares two choropleth maps of U.S. population growth: while they look rather different, they use the same data. “The difference between my map and Pew’s—again, they both use the exact same data set—underscores a bit of a dirty little secret in data journalism: Visualizing data is as much an art as a science. And seemingly tiny design decisions—where to set a color threshold, how many thresholds to set, etc.—can radically alter how numbers are displayed and perceived by readers.” [Andy Woodruff]
(Worth mentioning that this is exactly the sort of thing dealt with in Mark Monmonier’s How to Lie with Maps.)
BatiParis is an online map that shows the age of buildings in Paris (most of which, it reveals, were built between 1851 and 1914.) A note on the interface: clicking on the legend toggles the period of construction, so clicking on a date range removes it from the map the first time. [via]
Project Ukko visualizes seasonal wind predictions, i.e., the amount of wind that is forecasted for the upcoming season. It’s the sort of thing the wind generation industry would find useful. But such a prosaic purpose is belied by the breathtaking way in which the data is visualized. [via]
Le Grand Paris en Cartes is a collection of interactive maps and infographics about the Grand Paris Express, a multi-billion-euro project to extend Paris’s Metro and rapid transit network deep into the surrounding Île-de-France region (if you can read French, the official site and French Wikipedia page provide a lot more information). These maps not only illustrate Parisians’ commuting routes and Metro usage, but also (see above) the kind of sociological data that underpins transit planning: employment centres, population density and so forth. In French. [via]
Over on Metrocosm, Max Galka has assembled his pick of the 10 best New York City maps of 2015. The list includes maps of buildings, trees and languages, pathogens and crime, housing and “interestingness,” among others. [via]
An interactive map of attacks on aid workers since 2000. IRIN: “This map, a joint product between IRIN and Humanitarian Outcomes, is the first time ever the full scope of aid worker security events has been presented in visual form, which can be searched and filtered and browsed. It shows events from the beginning of 2000 until the end of May 2015. It’s a sobering testament to the dangerous work of saving lives.” [via]
Earth Wind Map is a transfixing animated visualization of global wind forecasts, updated every three hours. It would be fine enough to enjoy passively, but you can play with it: click and drag to change the view, select from a variety of map projections and pressure levels. Via io9 and GIS Lounge, among many others.
You may have seen this already: a beautiful, painting-like visualization of the world’s surface ocean currents between June 2005 and November 2007, which NASA posted last month. The visualization is based on model data from the ECCO2 project. See also this short video on Flickr (Flash required). Image credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.