Skip to main content
SimilarExport ZIP
100%

Fork of Fork of Grid Sampling on Census Tracts - Coloring the Grid

✓ Published1🌍 Public
CCurran Kelleher
Last edited May 8, 2024
Created on May 8, 2024

This interactive map visualizes New York census tracts on an orthographic projection, with a uniform grid of circles overlaid across the viewport. Grid points inside tract boundaries render as larger, colored circles using a sequential Cubehelix color scale, while points outside remain small. The code uses `d3.geoOrthographic`, `d3.geoPath`, and `topojson-client` for rendering, with `@turf/turf` for point-in-polygon tests and `rbush` for spatial indexing. Census data comes from a Gist, and drag and zoom interactions adjust rotation and scale.

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.

See also:

MIT Licensed

Similar vizzes

Loading thumbnail…

Fork of Fork of Fork of Grid Sampling on Census Tracts - Coloring by Data

This visualization displays New York City census tracts as a grid of colored squares, where each square’s color intensity represents the Black population count within the tract containing that grid point. The map supports drag-to-pan and zoom interactions, using a geographic orthographic projection. It relies on D3’s `geoOrthographic` and `geoPath`, alongside Turf’s `booleanPointInPolygon` and an RBush spatial index for efficient point-in-polygon queries. Data comes from the 2023 Census Bureau shapefiles and American Community Survey demographics, both loaded as JSON.

CCurran Kelleher
93% match
Loading thumbnail…

Fork of Grid Sampling on Census Tracts - Optimized

This example visualizes New York City census tracts on an orthographic globe projection, styled as a choropleth-like grid of points sampling each tract’s interior. The visualization shows demographic data from the U.S. Census Bureau’s 2023 ACS estimates. It uses `geoOrthographic`, `geoPath`, and a custom `map` module to render tract boundaries and a uniform grid of points, with an RBush spatial index and turf’s `booleanPointInPolygon` to test which grid points fall inside tracts. Drag and zoom interactions adjust the globe’s rotation and scale via `d3.drag` and `d3.zoom`.

CCurran Kelleher
92% match
Loading thumbnail…

Fork of Grid Sampling on Census Tracts - Contours from Points

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`.

CCurran Kelleher
88% match
Loading thumbnail…

Grid Sampling on Census Tracts - Brute Force

This example demonstrates a brute-force approach to sampling points from a set of New York City census tracts, visualizing them as a uniform grid of circles that appear only over land. The map uses an orthographic projection, and the code iterates through every grid cell, testing each one for land inclusion by checking if it falls within any census tract polygon using `d3.geoContains`. The base map is drawn with `d3.geoPath`, and the census tract data comes from a Gist containing processed TIGER/Line shapefiles.

CCurran Kelleher
85% match
Loading thumbnail…

Grid Sampling on Census Tracts - Contours from Sampling

This interactive map displays the distribution of the Black population across New York City census tracts. It creates and renders contour polygons derived from a grid-sampled raster of demographic data, which is then blurred and thresholded using D3’s `contours` and `blur2` APIs. The contours are converted to GeoJSON via Turf, while the base layer uses `geoOrthographic` and `geoPath`. County data comes from the 2023 Census Tracts shapefile, enriched with ACS demographic estimates.

CCurran Kelleher
84% match
Loading thumbnail…

Prototype of Geo Contours on Census Tracts

This prototype visualizes demographic distributions across New York City census tracts using geospatial contour lines. It blends overlaid choropleth-style contours colored by race (white, Black, Asian) onto a 3D orthographic projection, with an interactive pan-and-zoom interface. Data comes from the US Census Bureau’s 2023 Tracts shapefile and ACS estimates. The code uses `d3.geoOrthographic`, `d3.geoPath`, `d3.contours`, `@turf/turf` for point-in-polygon tests, and `RBush` for spatial indexing of tract boundaries.

CCurran Kelleher
81% match
Loading thumbnail…

Fork of New York Census Tracts Demographics: Black, Sqrt scale

This example visualizes the Black population distribution across New York census tracts, using a sequential square-root scale with the orange color palette to emphasize differences in population counts. The map supports pan and zoom interactions, with hover effects highlighting individual tracts. The code fetches demographic data from the American Community Survey API and combines it with TopoJSON geographic boundaries, rendering the result as SVG paths using `d3.geoPath`. It employs `d3.scaleSequentialSqrt` and `d3.interpolateOranges` for color encoding, with zoom handled by `d3.zoom`.

CCurran Kelleher
80% match
Loading thumbnail…

Fork of WIP New York Census Tracts Demographics

This visualization maps New York Census Tracts, coloring each polygon by its white population count from the 2018 American Community Survey API. The map uses `d3.geoPath` to render TopoJSON shapes into SVG paths and `d3.scaleSequential` with `interpolateGreens` for the choropleth encoding. Data joins associate census tract IDs with survey variables like B02001_002E, and a `d3.zoom` handler enables panning and zooming of the geographic display.

PPhilippe Rivière
80% match