acrasto-tibco

@acrasto-tibco·6 public vizzes

US Map with County Centroids using D3.js

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.

Jul 29, 2020

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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.

Jul 29, 2020

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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.

Jul 29, 2020

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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.

Jul 29, 2020

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Let's make an interactive US Map with D3.js!

An interactive SVG map of the United States renders state boundaries with basic hover styling. Using the D3.js and TopoJSON libraries, it loads a `states-10m.json` TopoJSON file, converts the topology into GeoJSON features, and projects them with an Albers equal-area conic projection via `d3.geoAlbersUsa()`. A zoom interaction updates the map's SVG transform, while each state path gains a tooltip showing its name.

Jul 28, 2020

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Let's make the US Map with D3.js!

This example displays a choropleth-style map of the United States with state boundaries rendered as SVG paths. It uses D3.js v5 to load US Atlas TopoJSON data, converts it to GeoJSON with the topojson library’s `feature` function, and projects it using `d3.geoAlbersUsa`. The `geoPath` generator draws each state as a separate path with a light green fill and subtle black strokes. A light blue sphere background is added first to contrast with the landmasses. The visualization intentionally omits labels or interactive features, focusing strictly on the geographic outlines.

Jul 28, 2020