tyrasd/osmtogeojson — pull request #27 by vsivsi (2014-07-08 00:05:46+00:00)
Title: Added verbose option that writes diagnostic messages to stderr

This implements part of #14.

I also have code to check/repair invalid polygons (edge crossings, duplicated nodes, etc.) but that seems better suited for a separate GeoJSON lint tool rather than as a part of format conversion.