Hi roboticus,

> Update 2... The exhaustive check gives the following misses:

wow ...indeed "a mess of bad triangles".

TSP publications reach back to before the 1950s and IIRC the data was mostly taken from German or Swiss cities.

17 cities is a rather small and surely old example and I think at that time they just copied the kilometers from a tourist guide or train schedule or similar, w/o taking much care.

So my theory was that just reaching the city limits naturally causes an error for large communities like Berlin or Zürich.

But I don't think it's worth to try to correct this now with something like a fuzzy surface in the visualization, better try starting from the beginning with real coordinates.

At least I think questioning the quality in my first reply was justified, it's worth checking data before trying to work with it.

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