Fork of Simulated COVID maps in the US and Canada
This interactive map uses D3.js v5 to simulate COVID-19 case counts across the United States and Canada. It plots scaled circles on a stereographic projection, with population data for counties and census divisions from 2016/2019 sources. Users can toggle between proportional and classed circle scaling, and switch subdivision granularity between states/provinces and counties/census divisions. The visualization draws GeoJSON boundaries and centroids via d3.geoPath, with circle radii determined by either d3.scaleSqrt or d3.scaleThreshold.
AI-generated descriptionSimulated COVID maps, inspired by https://coronavirus.jhu.edu/map.html
For context, see this twitter thread: https://twitter.com/mappingmashups/status/1382446649327296514
2016 Canada Census Division populations from: https://www12.statcan.gc.ca/census-recensement/2011/geo/bound-limit/bound-limit-2016-eng.cfm 2019 US county populations from: https://www.census.gov/data/datasets/time-series/demo/popest/2010s-counties-total.html
Classed legend more or less copied from the Johns Hopkins map:
<img src="https://i.imgur.com/H3KJrMp.png" alt="map legend" width="50%"/>