TopoJSON Points

100%

TopoJSON Points

✓ Published0🌍 Public

Last edited Feb 9, 2016

Created on Dec 29, 2012

This example maps a collection of airport locations across the United States using a TopoJSON MultiPoint geometry object. The airports are rendered as small dots over a gray landmass with white state boundaries, using an Albers projection. The code loads geographic base data from a separate US TopoJSON file and the airport points from a local TopoJSON file via the queue library, then draws everything with d3.geo.path and SVG paths.

AI-generated description

This example demonstrates encoding a MultiPoint geometry object using TopoJSON.

gpl-3.0 Licensed

Similar vizzes

Loading thumbnail…

U.S. TopoJSON

This example displays a layered map of the United States using county, state, and national boundaries. The map is rendered as SVG, with counties stroked in thin gray, states in thin black, and the nation in a thicker black outline. It loads TopoJSON data from the us-atlas package and uses the topojson-client library to compute and draw the geographic meshes and features. The visualization is built with d3.v4, using d3.json for data fetching and d3.geoPath for path generation.

Mmbostock

78% match

Loading thumbnail…

Gist efb1c9f3f0a9092c420dfe4cef8def96

This visualization displays a map of US airports, using a data-driven approach to plot the locations of each airport across the country. It shows the geographic distribution of airports using an Albers USA projection, with the map boundaries rendered as a shaded path. The code relies on the D3.js library, specifically `d3.geoAlbersUsa`, `d3.geoPath`, and `d3.json` for loading the TopoJSON map data and JSON airport coordinates. The final output is an SVG image, generated from these fetched datasets and projected onto a 960 by 500 pixel canvas.

PPhilippe Rivière

78% match

Loading thumbnail…

U.S. TopoJSON

This visualization displays U.S. state and county boundaries extracted from a TopoJSON file served from d3js.org. A blurred, semi-transparent silhouette of the nation appears behind a solid white version, creating a subtle depth effect. The code uses d3.geoPath to render the features, while topojson.feature and topojson.mesh convert the TopoJSON data into GeoJSON paths for drawing.

Mmbostock

77% match

Loading thumbnail…

Plotting Points on a Map

This visualization renders the contiguous United States from a TopoJSON dataset, mapping state boundaries and a light gray national background onto an SVG canvas. It uses the `d3.create` API to build the SVG element and the `topojson-client` feature function to convert the topology into geographic paths, which are then drawn with `d3.geoPath`. The code applies white strokes for state borders with rounded joins and caps, producing a clean, minimal choropleth base map without additional data layers.

PPareel Amre

77% match

Loading thumbnail…

U.S. States TopoJSON

This example shows a map of the United States rendered as SVG paths, where individual states turn red when hovered. The map uses the TopoJSON `us-atlas` file, loaded via `d3.json`, and the code relies on the `topojson` library to convert the TopoJSON topology into geographic features. The rendering is done with `d3.geoPath` to project the geometry, and state borders are drawn as a separate path using a mesh that highlights each boundary. No interaction beyond the hover effect is implemented.

Mmbostock

77% match

Loading thumbnail…

topojson.topology + topojson.mesh

This example demonstrates the Aitoff map projection of the United States, drawn on a Canvas element using D3.js. It renders the geographic boundaries as stroked and filled paths, created via `d3.geoPath` with the `d3.geoAitoff` projection. The code first reads a GeoJSON file containing the US shape, converts it to a topology using the `topojson.topology` function from the `unpkg.com/topojson` package, and then draws it with `topojson.mesh` from `d3js.org/topojson.v2`.

PPhilippe Rivière

77% match

Loading thumbnail…

TopoJSON via MapBox & Leaflet

This example shows a map of the United States with county boundaries rendered as vector shapes, overlaid on a zoomable and pannable MapBox tile layer. It combines D3.js and TopoJSON to load and parse county geometries from a remote GeoJSON-like file, then uses MapBox’s Leaflet-based `L.geoJson` to display them with a simple gray outline style. The map initializes at a low zoom level, and the counties are added as a single layer after asynchronous JSON retrieval, demonstrating integration between D3’s data handling and Leaflet’s mapping API.

CCaged

76% match

Loading thumbnail…

U.S. States TopoJSON small multiples

This example shows a small multiple of the United States, displaying 81 separate SVG maps, each with the nation’s landmass, county boundaries, and state borders drawn in a dark theme. The visualization uses TopoJSON to parse a US Census Bureau shapefile, with `d3.geo.albersUsa` projecting the geographic data onto a 96-by-50-pixel canvas. Each map is rendered by iterating over the topojson features and meshes, applying the same projection and path-generation logic to create a grid of repeated state outlines.

PPhilippe Rivière

76% match