Center and Scale your map

World Map Centered v5

This example displays a world map centered on the Pacific Ocean using a Mercator projection. It renders country boundaries as grey SVG paths with white strokes via `d3.geoPath`, projecting geographic data from a TopoJSON file. The map is rotated with `rotate([-180,0])` to shift focus away from the Atlantic, while `d3.json` loads the topology and `topojson.feature` extracts country geometries for display.

Dd3noob

Map of Spain

This example displays a map of Spain, projected using a Mercator projection and rendered as a single SVG path element. It loads world country boundaries from a TopoJSON file hosted on jsDelivr, then extracts Spain’s geometry using `topojson.feature`. The code uses `d3.geoMercator()` with `fitSize` to scale and center the map, and `d3.geoPath()` to generate the SVG path data. It demonstrates loading external GeoJSON/TopoJSON data asynchronously with `d3.json` and appending the result to an SVG canvas.

OOluoch Odhiambo

Let's make a map with D3.js!

This example demonstrates how to create a world map using D3.js and TopoJSON. It renders country boundaries as green SVG paths with thin black strokes on a dark blue background, using a Mercator projection. The visualization loads geographic data from the world-atlas TopoJSON file and converts it to GeoJSON features with the `feature` function. The code uses `d3.geoMercator` and `d3.geoPath` to project the map coordinates and generate the path data.

Ddacoylo

scale 200

This example shows a single unprojected map of Dutch arrondissement areas, rendered as a static SVG path. The visualization uses a Mercator projection with a fixed scale of 500, centering the geographic data on a 960×500 canvas. The code loads GeoJSON from a national georegistry Web Feature Service (WFS) endpoint, specifically the generalized 2019 CBS arrondissement boundaries. D3 v3’s `d3.geo.mercator()` and `d3.geo.path()` handle the projection and path generation, while the `d3.json` method fetches the remote data and appends the resulting path to the SVG container.

FFrieseWoudloper

Let's make a map with D3.js!

This example displays a world map rendered with SVG paths, using D3.js v5 and TopoJSON. It loads geographic country boundaries from the world-atlas dataset and projects them with a Mercator projection. The code uses `d3.geoPath` and `d3.geoMercator` to generate the map, while `topojson.feature` converts the TopoJSON data into GeoJSON features. Countries appear filled in steel blue with black, semi-transparent borders, demonstrating a minimal choropleth-style base map.

HHwl98

Preprojected TopoJSON

This example shows the autonomous regions of Spain displayed as a preprojected TopoJSON topology. The map is rendered using the `d3.geoPath` function to draw the polygon and MultiPolygon geometries, with shared arcs efficiently referenced between regions to form the composite border. The code loads the TopoJSON file with a `transform` and `scale` property, indicating the data is preprojected into planar coordinates. The visualization uses the D3.js library to parse and render the topology, demonstrating how complex boundary data can be compactly encoded and reproduced without a full geographic projection system.

LLuisSevillano

making a map

This example renders a world map using the Mercator projection, displaying country boundaries as SVG paths. The code loads geographic data from the World Atlas TopoJSON file, converts it to GeoJSON using `topojson.feature`, and draws the countries with `d3.geoPath`. The map is created with d3.v7, using a static SVG canvas sized to 960 by 500 pixels. The visualization demonstrates a straightforward approach to converting TopoJSON into a projected map with minimal styling.

KKikkolatsch

Spherical Mercator

The example shows the spherical Mercator projection applied to a world map, displayed within a circular outline that represents the globe. The map renders landmasses in dark gray with white country boundaries, overlaying a graticule grid of meridians and parallels. Built with d3.geoMercator and d3.geoPath, it draws the sphere outline, graticule, and world geography via SVG paths. Geographic data comes from the world-atlas TopoJSON dataset, processed with topojson-client to extract land and country meshes.

Mmbostock