Hi Willy I replied at answers.ros.org, but here's some extra info. The scan_tools stack is being maintained, although we are stretched a little thin in terms of manpower. If you find anything that's broken, or documentation that's out of date, let me know, and I'll fix it. Last time I checked (around cturtle) both canonical and polar were working. > BTW I am quite impressed of the precision out of the box of the > canonical_scan_matcher. The props for that should go Andrea Censi, whom I had the pleasure of meeting at ICRA a couple of days ago. Ivan PS looks like you just posted some track tickets. I'll take a look.