mbostock/topojson — pull request #43 by jasondavies (2013-02-25 23:27:24+00:00)
Title: Fix a few topology.filter bugs and reverse holes.

* Counterclockwise ring areas were being incorrectly calculated (the
area A is already negative so the positive area is π + A).
* The MultiPolygon filter should *exclude* polygons with an area smaller
than the minimum.