Skip to main content
SimilarExport ZIP
100%

US Map with County Centroids using D3.js

✓ Published0🌍 Public
Aacrasto-tibco
Last edited Jul 29, 2020
Created on Jul 29, 2020

A US map displays state boundaries in light green with small red circles marking county centroids, computed via `d3.geoPath` and `d3.geoCentroid` from TopoJSON data. The visualization uses D3 v5 and the `geoAlbersUsa` projection, rendering SVG shapes. County population and COVID-19 case data from a CSV file determines circle sizing, though the visible circles have a fixed radius. Zooming is enabled through `d3.zoom`, and the map is drawn from the us-atlas counties-10m.json dataset.

AI-generated description
MIT Licensed

Similar vizzes

Loading thumbnail…

County Population Circles on US Map with D3.js!

This example displays COVID-19 case counts as scaled circles overlaid on a map of US counties. The visualization uses `d3.geoAlbersUsa()` for projection, `d3.geoPath` to render state boundaries from TopoJSON, and `d3.scaleSqrt` to map case counts to circle radii based on data from a CSV file. County centroids, computed with `geoPath.centroid`, position the circles, while a `d3.zoom` handler enables panning and zooming.

Aacrasto-tibco
91% match
Loading thumbnail…

County Population Bubble Map for the US with D3.js!

A county population bubble map for the US uses an SVG projection with geoAlbersUsa and d3.geoPath to render state and county boundaries from TopoJSON data. Circles positioned via pathGenerator.centroid are sized by a d3.scaleSqrt mapping COVID-19 case counts from a CSV dataset, with zoom enabled through d3.zoom for interactive exploration.

Aacrasto-tibco
89% match
Loading thumbnail…

Population Circles on US Map with D3.js!

This interactive map of the United States visualizes county-level population data as circles. It uses the D3.js library (v5) to render an SVG graphic, employing `d3.geoPath` and a map projection sourced from a TopoJSON file. County centroids are calculated with `d3.geoCentroid` to position each circle. The visualization reads population figures from a local CSV file, and includes a zoom feature via `d3.zoom` for user interaction.

Aacrasto-tibco
86% match
Loading thumbnail…

Let's make a map US-counties with D3.js!

This example renders a choropleth-style map of all US counties as light green SVG paths with subtle black borders. It uses D3 v5’s `geoAlbersUsa` projection and `geoPath` generator to convert TopoJSON county boundaries from the `us-atlas` dataset into scalable vector graphics. The code loads the TopoJSON via `d3.json`, extracts features with `topojson.feature`, and binds them to SVG path elements, while styling is handled with CSS class selectors.

NNita
84% match
Loading thumbnail…

Let's make a map of US-counties with D3.js:"hover and county name "

This example displays a choropleth-style map of all US counties rendered as SVG paths, with county names revealed on hover via a native `<title>` element. The visualization uses D3 v5’s `geoAlbersUsa` projection and `geoPath` to draw county boundaries from TopoJSON data loaded from the us-atlas package. County shapes are styled with black strokes and a green fill on mouseover, showing the geographic distribution of administrative divisions. The code filters the TopoJSON for county features and binds them to path elements, relying on the browser’s built-in tooltip behavior for the name display.

NNita
83% match
Loading thumbnail…

map: usa, counties

This example renders a choropleth-style map of the United States, displaying county and state boundaries overlaid on landmasses, with graticules and a sphere outline. It uses a React component with `d3.geoAlbersUsa` for projection and `d3.geoPath` for drawing geometries. Data comes from the US Atlas TopoJSON (`us-atlas@3.0.0/counties-10m.json`), processed with `topojson.feature` and `topojson.mesh`. Interactive tooltips show county and state names on hover. The SVG output is styled with semi-transparent fills and distinctive boundary strokes.

Zzach b.
82% match
Loading thumbnail…

US Map

This interactive visualization displays all US counties as a choropleth-style map rendered with a natural Earth projection using d3.geoPath. The map is drawn with SVG elements, featuring graticules and a sphere outline to provide geographic context. County boundaries come from a TopoJSON file loaded asynchronously and converted to GeoJSON features. Built with React and D3 v7, the visualization dynamically fills the browser window and uses the Poppins font for its minimal interface.

JJohn Lewis
82% match
Loading thumbnail…

US Counties

This map of US counties displays all county boundaries with a subtle drop-shadow effect. The code uses D3 v4’s `d3.geoAlbersUsa` projection and `d3.geoPath` to render geographic features. It loads TopoJSON from a local `counties.json` file and converts it to GeoJSON via `topojson.feature` and `topojson.mesh`. The visualization plots state borders as a separate mesh, overlays white and blurred nation outlines for depth, and draws each county as an outlined SVG path with thin gray strokes.

MMTClass
82% match