mbostock/d3 — pull request #887 by jasondavies (2012-11-10 21:59:29+00:00)
Title: d3.geo.circle: generate GeoJSON Polygon.

As well as clipping against a given circle, you can now generate a GeoJSON object representing the circle.

/cc @RandomEtc

Note: I’d like to clean up the internals for d3.geo.circle a bit more, but that can wait for another pull request.