NY Counties

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Last edited May 18, 2017

Created on May 18, 2017

A choropleth map of New York State counties colors each county by population density using a threshold scale and the d3.schemeOrRd sequential color scheme. The map uses d3.geoPath with a transverse Mercator projection, and topojson-client to convert county boundaries from TopoJSON. Hovering highlights a county and displays its name and density in a tooltip, while a legend with a power scale explains the color ranges. Data comes from a provided GeoJSON/TopoJSON and population CSV, inspired by a Mike Bostock example.

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