Opacity Linear Scale

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Opacity Linear Scale

✓ Published0🌍 Public

Last edited May 18, 2021

Created on May 18, 2021

This visualization maps New York census tracts, using a green color scale to represent the white population density—the greener the tract, the more white residents it has. The data comes from the American Community Survey API, joined with TopoJSON geometry from a GitHub gist. The code uses d3.scaleLinear to map white population counts to an opacity range, creating a semi-transparent overlay, while d3.geoPath renders the tract shapes and d3.zoom enables pan and zoom interaction.

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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