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Fork of Grid Sampling on Census Tracts - Contours from Points

✓ Published0🌍 Public
CCurran Kelleher
Last edited May 9, 2024
Created on May 9, 2024

This interactive map visualizes contours of Black population density across New York City census tracts, projected on a rotatable orthographic globe. The visualization uses D3’s `geoOrthographic`, `geoPath`, and `contourDensity` APIs to generate smoothed density bands from tract centroid points weighted by population and land area, colored with a sequential orange scale. Census tract boundaries appear as thin black outlines, while drag and zoom interactions rotate and scale the projection in real time via `d3.drag` and `d3.zoom`. Data comes from the 2023 Census shapefiles and ACS demographics, loaded via `d3.json` and processed with `topojson-client`.

AI-generated description

Data for New York census tracts, downloaded from https://www.census.gov/cgi-bin/geo/shapefiles/index.php?year=2023&layergroup=Census+Tracts and processed using https://mapshaper.org/.

Data resides in Gist: New York City Census Tracts.

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MIT Licensed

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