Cloudant Post

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Last edited Jul 26, 2014

Created on Jul 26, 2014

This example visualizes the geographic distribution of user-uploaded content from a Cloudant database, rendered as an interactive map. It first retrieves raw GeoJSON data from the Cloudant API, then uses `d3.geoPath` to project and draw country outlines, while `d3.forceSimulation` positions individual point markers based on their latitude and longitude. The map’s tile layer is generated with Canvas `getImageData` to apply a custom color scale to population density, and user interactions trigger `transition.attrTween` for smooth panning and zooming. The code relies on Three.js for the underlying WebGL rendering of the base terrain.

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