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class 3 - states

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MMTClass
Last edited Mar 10, 2017
Created on Mar 10, 2017

This example shows a map of the United States with earthquakes from the past week overlaid as colored points. The map uses an Albers USA projection with state boundaries rendered via `d3.geoPath` and TopoJSON data from the UMBC visualization course. Earthquake locations come from the USGS GeoJSON feed, with points colored by magnitude using a scale from green to red. A legend in the corner explains the magnitude ranges, while a mousemove event displays latitude and longitude coordinates using `projection.invert`.

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