Lab 9: Pop Density in Top 20 US Cities by Pop 1980, 1990, 2000 & 2010

This Leaflet map shows the population density (population per square mile) in the top 20 US cities by population. Leaflet, JavaScript and open source mapping in general seem to be where things are heading for now. I'm still finding my way here but it's beginning to make more sense.

Link: http://mason.gmu.edu/~jvigil4/lab_09/jv_lab09c.html