A fun stress test for Visvalingam line simplification while preserving topology.
TopoJSON encodes sequences of points which are shared by more than one feature as separate “arcs”. Each arc is then simplified separately using Visvalingam’s algorithm, eliminating the issue where naïvely applying line simplification to all input polygons can cause shared borders to be simplified differently. Move your mouse to adjust the minimum area threshold.
29 October 2012