d3‑geo provides a JavaScript library of spherical projections, geographic feature handling, and trigonometric utilities for turning GeoJSON data into projected coordinates on a map. It lets developers create and manipulate a wide range of D3 map visualizations—from standard projections to custom rotated views—making it ideal for geospatial data analysts, cartographers, and web developers building interactive maps with D3.js.
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Support the dependencies of d3/d3-geo
Array manipulation, ordering, searching, summarizing, etc.
Canvas graphics API backed by Cairo
Format numbers for human consumption.
simple, flexible, fun test framework
The smallest and fastest pixel-level image comparison library.
PNG encoder/decoder in pure JS, supporting any bit size & interlace, async & sync with full test suite.
Next-generation ES module bundler
Manipulate TopoJSON and convert it to GeoJSON.
Pre-built TopoJSON from Natural Earth.
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