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Last edited Aug 3, 2023

Created on Aug 3, 2023

This example shows a large blue circle centered on an empty SVG canvas, serving as a placeholder for a geographic visualization. The code sets up a D3 v5 environment with TopoJSON support, importing specific functions like `select`, `geoPath`, and `geoEquirectangular` from D3, along with the `feature` method from TopoJSON. It uses D3’s `select` to access the SVG element and appends a circle with a radius of 200 pixels, positioned at the canvas midpoint. The accompanying CSS defines styles for future Earth and country layers, though no geographic data is loaded or rendered.

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