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This example presents an interactive map of the United States using d3.geo.path with an Albers USA projection, rendering state boundaries as SVG paths. Clicking a state triggers a smooth zoom animation that scales and translates the map to center on the selected region, highlighting it in orange. The map is constructed from topojson.feature and include a mesh overlay for state borders. The zoom effect is achieved by transitioning the group element's transform attribute using d3.transition over 750 milliseconds.

Ppcsong33

AlbersUSA + PR

This example presents a modified Albers USA map projection that includes Puerto Rico, rendered as an SVG using D3.js v3 and TopoJSON. The code defines a custom `albersUsaPr()` function, which composes four separate conic equal-area projections for the lower 48 states, Alaska, Hawaii, and Puerto Rico, each with its own translation and clipping. The map displays graticules and a sphere outline via `d3.geo.graticule()` and `d3.geo.path()`, and it loads US state boundaries from an external JSON file. Interactive mouse movement logs the projected coordinates using `projection.invert()`.

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This interactive map of the United States uses a D3.js geographic projection to display state boundaries, rendered as SVG paths from TopoJSON data. Clicking a state zooms in via a smooth `transition` that adjusts the group’s scale and translate attributes, while the clicked state is highlighted in orange. A click on the background resets the view, returning the map to its original scale and stroke width. The example relies on `d3.geo.albersUsa`, `d3.geo.path`, and TopoJSON’s `feature` and `mesh` methods.

CChase Hall

Albers Projection

This example displays a map of the United States using the Albers projection, with each state drawn as a filled gray polygon with white outlines. The visualization loads GeoJSON data from a remote `us.json` file via `d3.json`, which is then converted into SVG paths using `topojson.feature` and `d3.geo.path()`. The map is rendered as a single SVG path element within a 960×500 canvas, demonstrating a basic static choropleth without additional interactivity or styling layers.

Albers Projection

This example displays a map of the United States using the Albers projection, a conic equal-area projection commonly used for national-scale choropleths. It renders the geographic boundaries as gray SVG paths with white strokes, loaded from a local `states.json` GeoJSON file. The code uses the D3 v3 library, specifically the `d3.geo.albers()` projection and `d3.geo.path()` to project and draw the feature collection.

85% match

Albers USA

This example illustrates the Albers USA composite projection by dividing the map into four colored regions, each labeled with the conditional rule that determines which part of the United States it represents. It overlays a world map and graticule to show the geographic context. The visualization uses D3 v3 with `d3.geo.mercator`, `d3.geo.mercator`, `d3.geo.path`, and `d3.geo.graticule` to project and render SVG paths, while the division rectangles and lines are drawn manually to mark the Alaska, Hawaii, Puerto Rico, and lower-48 regions. World land data comes from a remote TopoJSON file.

85% match

state map

This example displays a map of US state boundaries using the geo-albers-usa-territories projection, which extends the standard Albers USA projection to include US territories. The map renders state land areas in teal with lighter interior mesh lines separating adjacent states, drawn as SVG paths via `d3.geoPath`. React components manage the visualization, with `useData` fetching TopoJSON from the US Atlas repository and converting it to GeoJSON using `topojson.feature` and `topojson.mesh`. The code also defines a graticule with `d3.geoGraticule` for reference lines.

Bbhargavarathod

84% match