That SF map is bullshit. In general you would never see such an even spacing of startups (or most anything) unless someone were trying distribute them very care

That SF map is bullshit. In general you would never see such an even spacing of startups (or most anything) unless someone were trying distribute them very carefully. And specifically there are a number of super dense hotspots that should stand out in a map like that. Someone just painted those dots according to what might look good.