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Multivariate Choropleth Experiments with Clipped Outline

✓ Published1🌍 Public
AAlan McConchie
Last edited Apr 6, 2021
Created on Apr 6, 2021

This visualization displays multivariate racial demographic data for New York census tracts, blending three HCL colors—white, black, and Asian—through a multiplicative d3.scaleSqrt transform to show population concentrations. Each tract’s fill combines opacities scaled by population counts, with a clip-path masking the map to the state’s simplified shoreline. Built with D3 v6 and topojson, it fetches American Community Survey data and renders SVG paths via d3.geoPath, plus an ordinal color legend.

AI-generated description

A way to visualize multidimensional racial demographic data for census tracts. This uses a square root scale instead of a linear scale, and uses 3 colors that are all the same saturation and luminance (in the HCL color space).

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.

Color legend from VizHub: Color and Size Legends.

MIT Licensed

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