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Firefly Map of Coronavirus Case Locations

✓ Published1🌍 Public
CChristopher Morrissey
Last edited Apr 3, 2020
Created on Apr 3, 2020

This map shows the locations of confirmed Coronavirus cases as of March 5, 2020, with each point rendered as a glowing firefly-like sprite on a dark, inverted OpenLayers basemap. The visualization uses a React component with OpenLayers vector layers and a custom canvas-generated radial gradient sprite, styled via d3’s cubehelix color interpolation to create a soft glow effect. Data comes from the Johns Hopkins CSSE COVID-19 time series, filtered to include only locations with at least one case, and mapped using the GeoJSON format with vector tiles in Web Mercator projection.

AI-generated description

Firefly Cartography with OpenLayers and React.

Each point on the map is a location for which there was at least one confirmed Coronavirus case as of 3/5/2020. Each location is shown as the same size and intensity, regardless of how many cases there were (this is a shortcoming of this visualization).

Data from Johns Hopkins: CSSEGISandData/COVID-19;

MIT Licensed

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