Multivariate Choropleth Live Coded at Outlier

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Multivariate Choropleth Live Coded at Outlier

✓ Published3🌍 Public

Last edited May 8, 2024

Created on Feb 4, 2021

A multivariate choropleth map depicts New York census tracts, blending green, orange, and magenta opacity scales to represent white, Black, and Asian population counts from American Community Survey data. The visualization uses d3.json and d3.geoPath to render TopoJSON geometries, with d3.scaleSqrt mapping each demographic to color opacity. Color blending combines the three channels via the color-blend library’s multiply mode. The map supports d3.zoom for panning and displays population values for each tract on mouseenter via console logging.

AI-generated description

An intermediate state on the way towards trying to visualize multidimensional data for census tracts. The more green it is, the more white people there are.

This uses a linear scale that varies in opacity only.

Data from bl.ocks.org: New York Census Tracts by Mike Bostock.

Fetching of American Community Survey data inspired by Observable: Racial distribution in NC by Mark McClure.

The variables used are documented in the ACS API Reference.

MIT Licensed

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