Also on these boards
Matthew Picton, map of London (Great Fire, 1666), "Paper Sculptures" series. The map "depicts burned illustrations of 17th century street life." Caption from link
The Visual Insights team is obsessed with the patterns that emerge from aggregated Tweets over time. A continuing curiosity is about the geographical shapes that surface in geotagged Tweets. The images we’re sharing here use all of the geo-tagged Tweets since 2009 — billions of them. (Every dot is a Tweet, and the color is the Tweet count.)
Here is a detail accompanying the Chicago ethnicity map from 1950. They made a series of wage maps to accompany those of nationality, identifying the relative levels of income in each household. The black represented the lowest wage, so as to make it easier to identify the severest level of poverty. These maps were collaborations between several members of Hull House, most importantly Florence Kelley and Agnes Holbrook.